Given all this talk I decided to take a little action.
I've taken some time to look at UU and weed out what is essentially the new NU. The current UU has lasted long enough for us to get a good reading and feeling of what has becomes NU. With the direction this UU/BL discussion is heading, dropping the excess saves time when discussing and gives us a bottom structure at least. Its safe to say if we're raising the bar for UU, then what was unable to compete in the current UU doesn't stand a chance in a even faster UU.
Carnivine, Huntail, Corsola, Skuntank, Sunflora, Illumise, Delibird, Ditto, Girafarig, Spinda, Solrock, Pachirisu, Phione, Ariados, Stantler, Pidgeot, Plusle, Swalot, Mawile, Masquerain, Granbull, Minun, Volbeat, Bellossom, Delcatty, Glalie, Unown, Vigoroth, Crawdaunt, Tropius, Beautifly, Fearow, Arbok, Victreebel, Chimecho, Kricketune, Cherrim, Chatot, Farfetch'd, Mothim, Exploud, Wigglytuff, Wailord, Castform, Magcargo, Vespiquen, Wormadam, Whiscash, Luvdisc, Lunatone, Wormadam-S, Wormadam-G, Lumineon, Seviper, Dustox, Ledian, Seaking, Furret, Golem
Everything in this list has either been in steady/heavy decline or has been well below the top 200 for usuage for months now. Notable things being Crawdaunt who is excellent however has seen literally no usuage, my guess being at the expense of Sharpedo's popularity. Carnivine, Stantler, Victreebel have also been easily falling into disuse.
Golem I'm honestly reluctant to add here as I know its quite good, but it has been seeing a very high drop with each incoming month. This month it just fell below the 200 marker I've been using.
Sableye is a odd case, it would've made this list however within the last two months its completely surged in usuage. Literally rocketting well into UU territories. Could say it just made a last ditch rush into safe territory.
What this leaves us with is our current UU.
Linoone, Shuckle, Camerupt, Hitmonchan, Drifblim, Hypno, Ninetales, Altaria, Persian, Omastar, Nidoqueen, Kabutops, Butterfree, Swellow, Golduck, Kangaskhan, Pinsir, Armaldo, Purugly, Poliwrath, Probopass, Cacturne, Banette, Jumpluff, Pikachu, Primeape, Toxicroak, Blastoise, Muk, Nidoking, Gorebyss, Bibarel, Lapras, Glaceon, Meganium, Grumpig, Cradily, Gastrodon, Raichu, Aggron, Venomoth, Cloyster, Dunsparce, Rapidash, Clefable, Relicanth, Kingler, Mr. Mime, Lanturn, Ampharos, Claydol, Manectric, Walrein, Qwilfish, Luxray, Rotom, Absol, Hitmonlee, Electrode, Scyther, Sandslash, Lopunny, Hitmontop, Torkoal, Sharpedo, Mightyena, Froslass,
Dewgong*, Beedrill*, Quagsire*, Vileplume*, Xatu*, Clamperl*, Flareon*, Sableye*, Mantine*, Pelipper*, Noctowl*, Dodrio*, Parasect*, Politoed*, Octillery*, Kecleon*, Sudowoodo*, Raticate*
Most of what is in this list has either managed to be used on a regular basis or has not shifted much from their positions. Clamperl is probably the biggest (lol wtf) but it has gotten some good usuage during the last 3 odd months. Flareon somehow finally pulled itself out of disuse by some miracle. As it stands this is what we're likely beginning with for the record and at the same time I'm wondering whether it may be time to submit the NU's.
Edit:
Made a few corrections, Dewgong, Beedrill and Parasect should be in the lower end UU.
As of now many of these UU only just barely teeter outside of disuse, I've separated and marked the ones which are in this situation. These are the ones who are performing worst but have been abit too inconsistent in usuage decide on.
Biggest surprises here are Quagsire who is often touted as a major threat in the UU circle, Sudowoodo with its excellent coverage. Noctowl and Pelliper quite sturdy pair of birds who can hold their own even in higher levels of play. Even Vileplume who was formerly a BL in Advance.