With the removal of the annoying purple bat and the black crow of death, UU has certainly shifted quite a bit. I built this team to try to counter some of the newer threats, and has been to excellent degrees, but I've noticed a couple of holes and I'd like some help filling them. Without further adieu:
Mespirit@Choice Specs
56 HP/252 SpA/220 Spe
Timid/Levitate
-Psychic
-Thunderbolt
-Ice Beam
-Trick
Comments: Trick Mespirit lead. I chose specs over scarf because it gives me enough power to take out several other leads (chance to OHKO standard Electrode, thus screwing up Rain Dance teams), and act as a good sweeper in her own right. Trick is for Registeel and Chansey that love to switch in on her (I've also seen quite a few Registeel leads and take full credit for making it popular back before the BL :P). BoltBeam is perfect coverage on most everything in UU except Lanturn who is dealt with through Psychic and the rest of my team. I've considered running a Trick scarf instead of specs, but so far I've found no real reason to.
Clefable@Toxic Orb
252 HP/152 Def/100 SpD
Calm/Magic Guard
-Encore
-Seismic Toss
-Thunder Wave
-Softboiled
Comments: A holdover from my old UU team and pseudo special wall. She can easily take non choiced/boosted special hits and paralyze quicker sweepers. Can also Encore statup moves and subs (everyone loves trying to set up subs against clefable <_<) to give me a free swap out or chance to T-wave whatever comes in. Often times, she'll be my last pokemon alive and be able to outstall or outwit (through good use of Encore) the last 1-2 pokes on my opponent's team (although one time I won a 1-4 game with Clefable <_<). All in all, Clefable is my best check to several threats like Baton Pass teams, stat uppers, and sub drummers like Charizard and Azumarril. She requires perfect prediction, though, and when I get outsmarted I get in trouble.
Steelix@Leftovers
252 HP/120 Atk/136 SpD
Rock Head/Impish
-Gyro Ball
-Earthquake
-Stealth Rock
-Toxic
Comments: Steelix is my physical tank and has an extremely high amount of safe switch ins in the tier. Setting up rocks is a bonus, and his STAB Earthquake is extremely powerful despite his "tank" status. Gyro Ball hits scarfers for quite a lot as well. Toxic is used to hit several walling threats like Dual Screen Rotom (who is becoming popular with the lack of Honchkrow) who my team has trouble against, and Bulky Milotic sets. Fairly standard, but for good reason.
Toxicroak@Life Orb
6 HP/252 SpA/252 Spe
Timid/Dry Skin
-Nasty Plot
-Vacuum Wave
-Dark Pulse
-Sludge Bomb
Comments: The best counter to the rampant Rain Dance teams, bar none. Dry Skin gives water absorption and heals my LO recoil in the rain, Nasty Plot on the switch gives me the ability to OHKO every common Rain Dance poke while not fearing an OHKO from any of them. Unboosted Vacuum Wave OHKOs standard Kabutops and 2HKOs Omastar. Unboosted Sludge Bomb OHKOs any Ludicolo. Sludge Bomb also 2HKOs LO Milotic whom he Outspeeds but takes huge damage from Ice Beam. Boosted (+2) Dark Pulse has a chance to OHKO standard Uxie after rocks, and the same for every other Ghost type bar Dusclops. Sludge Bomb is the best neutral damage attack I have. It can do significant damage (and OHKO if boosted) to Blaziken, whom EVs and nature allow me to always outspeed. All in all, completely awesome poke and good revenge killer, and the second holdout from my old team.
Mismagius@Leftovers
6 HP/252SpA/252 Spe
Modest/Levitate
-Substitute
-Calm Mind
-HP Fighting
-Shadow Ball
Comments: If it ain't broke, don't fix it. Ghost typing makes it the best switch in to choiced Fighters who are rampant these days. It can sub and stat up in the face of weaker special attackers and walls like Slowbro and Chansey. Other than that, really there's not much more to say that hasn't already been said about it.
Hariyama@Leftovers
80 HP/252 Atk/172 Def/6 Spe
Adamant/Thick Fat
-Substitute
-Focus Punch
-Payback
-Ice Punch
Comments: I've been cycling many things (RP Torterra, LO Roserade, CB Sceptile, etc) through this slot but Hariyama has filled it out the best. It can sub on nearly any wall (barring Slowbro/king with Psychic) then proceed to launch Focus Punches at everything. Ice Punch covers my DD Altaria weakness and Torterra who can be a pain. I swapped the Atk and Def EVs and went Adamant because I was using him on an offensive team mostly for epitomizing the bulky offensive type. He's my best check to choiced fighters locked in Stone Edge or something similar and, as mentioned before, can set up very easily against stall teams. I've been considering swapping out Focus Punch for Close Combat or Force Palm because there are times when I just can't safely get a sub up and the lack of a fighting move is disconcerting.
Identified threats:
Espeon: Trickspecs or SubCM, both cause problems for my team, especially if it gets behind a sub. The only thing I have on my team that can straight OHKO it is Payback on Hariyama, but Psychic easily OHKOs him. Steelix resists everything Espeon would use, but fears the specs.
Rotom: I can't touch the little bastard with anything but Mismagius really. Hariyama fears the burn and Toxicroak can't handle too many T-bolts. Encoring it with Clefable then killing or poisoning it has been my best bet so far.
Scarf Typhlosion: Hariyama is the only thing that can really stand up to it as I lack a bulky water. If I can't get rocks up, he can keep coming in and Eruption-ing my team to death.
Magneton: T-bolt really hurts even Clefable with investment, and it can trap and kill Steelix, leaving me physical wall-less. Toxicroak can revenge it with Vacuum Wave, but not much else can hurt it too badly.
Roserade: Mespirit OHKOs it, Toxicroak resists everything it has and can NP and do serious damage to it, but I still don't have anything that can switch into a LO/specs Leaf Storm without taking ridiculous damage.
Considering:
-Close Combat over Focus Punch on Hariyama
-Scarf on Mespirit to better deal with Roserade leads.
-Tbolt/HP Ground on Mismagius

Mespirit@Choice Specs
56 HP/252 SpA/220 Spe
Timid/Levitate
-Psychic
-Thunderbolt
-Ice Beam
-Trick
Comments: Trick Mespirit lead. I chose specs over scarf because it gives me enough power to take out several other leads (chance to OHKO standard Electrode, thus screwing up Rain Dance teams), and act as a good sweeper in her own right. Trick is for Registeel and Chansey that love to switch in on her (I've also seen quite a few Registeel leads and take full credit for making it popular back before the BL :P). BoltBeam is perfect coverage on most everything in UU except Lanturn who is dealt with through Psychic and the rest of my team. I've considered running a Trick scarf instead of specs, but so far I've found no real reason to.

Clefable@Toxic Orb
252 HP/152 Def/100 SpD
Calm/Magic Guard
-Encore
-Seismic Toss
-Thunder Wave
-Softboiled
Comments: A holdover from my old UU team and pseudo special wall. She can easily take non choiced/boosted special hits and paralyze quicker sweepers. Can also Encore statup moves and subs (everyone loves trying to set up subs against clefable <_<) to give me a free swap out or chance to T-wave whatever comes in. Often times, she'll be my last pokemon alive and be able to outstall or outwit (through good use of Encore) the last 1-2 pokes on my opponent's team (although one time I won a 1-4 game with Clefable <_<). All in all, Clefable is my best check to several threats like Baton Pass teams, stat uppers, and sub drummers like Charizard and Azumarril. She requires perfect prediction, though, and when I get outsmarted I get in trouble.

Steelix@Leftovers
252 HP/120 Atk/136 SpD
Rock Head/Impish
-Gyro Ball
-Earthquake
-Stealth Rock
-Toxic
Comments: Steelix is my physical tank and has an extremely high amount of safe switch ins in the tier. Setting up rocks is a bonus, and his STAB Earthquake is extremely powerful despite his "tank" status. Gyro Ball hits scarfers for quite a lot as well. Toxic is used to hit several walling threats like Dual Screen Rotom (who is becoming popular with the lack of Honchkrow) who my team has trouble against, and Bulky Milotic sets. Fairly standard, but for good reason.

Toxicroak@Life Orb
6 HP/252 SpA/252 Spe
Timid/Dry Skin
-Nasty Plot
-Vacuum Wave
-Dark Pulse
-Sludge Bomb
Comments: The best counter to the rampant Rain Dance teams, bar none. Dry Skin gives water absorption and heals my LO recoil in the rain, Nasty Plot on the switch gives me the ability to OHKO every common Rain Dance poke while not fearing an OHKO from any of them. Unboosted Vacuum Wave OHKOs standard Kabutops and 2HKOs Omastar. Unboosted Sludge Bomb OHKOs any Ludicolo. Sludge Bomb also 2HKOs LO Milotic whom he Outspeeds but takes huge damage from Ice Beam. Boosted (+2) Dark Pulse has a chance to OHKO standard Uxie after rocks, and the same for every other Ghost type bar Dusclops. Sludge Bomb is the best neutral damage attack I have. It can do significant damage (and OHKO if boosted) to Blaziken, whom EVs and nature allow me to always outspeed. All in all, completely awesome poke and good revenge killer, and the second holdout from my old team.

Mismagius@Leftovers
6 HP/252SpA/252 Spe
Modest/Levitate
-Substitute
-Calm Mind
-HP Fighting
-Shadow Ball
Comments: If it ain't broke, don't fix it. Ghost typing makes it the best switch in to choiced Fighters who are rampant these days. It can sub and stat up in the face of weaker special attackers and walls like Slowbro and Chansey. Other than that, really there's not much more to say that hasn't already been said about it.

Hariyama@Leftovers
80 HP/252 Atk/172 Def/6 Spe
Adamant/Thick Fat
-Substitute
-Focus Punch
-Payback
-Ice Punch
Comments: I've been cycling many things (RP Torterra, LO Roserade, CB Sceptile, etc) through this slot but Hariyama has filled it out the best. It can sub on nearly any wall (barring Slowbro/king with Psychic) then proceed to launch Focus Punches at everything. Ice Punch covers my DD Altaria weakness and Torterra who can be a pain. I swapped the Atk and Def EVs and went Adamant because I was using him on an offensive team mostly for epitomizing the bulky offensive type. He's my best check to choiced fighters locked in Stone Edge or something similar and, as mentioned before, can set up very easily against stall teams. I've been considering swapping out Focus Punch for Close Combat or Force Palm because there are times when I just can't safely get a sub up and the lack of a fighting move is disconcerting.
Identified threats:
Espeon: Trickspecs or SubCM, both cause problems for my team, especially if it gets behind a sub. The only thing I have on my team that can straight OHKO it is Payback on Hariyama, but Psychic easily OHKOs him. Steelix resists everything Espeon would use, but fears the specs.
Rotom: I can't touch the little bastard with anything but Mismagius really. Hariyama fears the burn and Toxicroak can't handle too many T-bolts. Encoring it with Clefable then killing or poisoning it has been my best bet so far.
Scarf Typhlosion: Hariyama is the only thing that can really stand up to it as I lack a bulky water. If I can't get rocks up, he can keep coming in and Eruption-ing my team to death.
Magneton: T-bolt really hurts even Clefable with investment, and it can trap and kill Steelix, leaving me physical wall-less. Toxicroak can revenge it with Vacuum Wave, but not much else can hurt it too badly.
Roserade: Mespirit OHKOs it, Toxicroak resists everything it has and can NP and do serious damage to it, but I still don't have anything that can switch into a LO/specs Leaf Storm without taking ridiculous damage.
Considering:
-Close Combat over Focus Punch on Hariyama
-Scarf on Mespirit to better deal with Roserade leads.
-Tbolt/HP Ground on Mismagius