In any case, the only thing I really do not like at all this generation is Latios and maybe the weather changers Politoed and Ninetales. Most Latios tend to be stupidly annoying Choice variants that basically require me to run a bulky steel lest it kills you in 12 turns with Draco Meteor abuse. Even then that's prone to failure.
As for Ninetales and Politoed, there's nothing wrong with them, per se, but it seems as though you absolutely need to carry a weather changer of your own unless you want them to have a major advantage from turn 1, whether it be a Ninetales or Politoed of your own, Tyranitar, Hippowdon, or maybe even Abomasnow.
You could argue the same for Tyranitar and Hippowdon this generation, considering things like Landos and Excadrill.
And, the only real advantage rain gets is the STAB boost now. Rain Stall happens to have vanished off the face of the earth from what I've seen, because there isn't Rain offense everywhere to give Parasect a free switch-in. [I did say it wasn't really viable, it was just anti-meta].
I've never even seen anyone use Hydra-rest Vaporeon/Lapras. [Any other user isn't even worth mentioning] Rain is FAR from broken with SS+Drizzle combo-banned.
Now, Sun does give a massive advantage, but it is manageable. No-one is running in fear of Grass STAB, except, ironically, opposing weather. And Boosted Fire STAB hurts, but there's no speed bonuses. Blaziken is what makes Sun so dangerous right now, and Blaziken is suspect in it's own right, let alone in the sun.
Now, to my opinions on the pokemon suspects:
Blaziken: Needs to go. One turn is all it needs, to abuse BP 120+ STAB moves, with excellent coverage, while outspeeding... virtually everything. Then there's MixKen, or Blaziken who use Swords Dance [Because almost everyone expects Protect...]. Not to mention Blaziken under the sun, which boosts his Fire STAB even more, AND removes his weakness to water. Azumarill can no longer check him... that's one down from a VERY short list. The fact that Im given trouble by Blaziken, even when running a Rain team... shows just how bad he is.
Deoxys-E: I've had no issues with him, personally. He can set up hazards. Big woop. So can Nattorei, and he can do other things sucessfully besides. And no, Nattorei being slow and tauntable isn't *that* much of a point considering Mischevious Heart, and most other things that use Taunt, such as Gliscor, are not *massive* fans of Gyro Balls/Power Whips. *Especially now most Gliscor run Poision Heal, so no Roost*
Then there's Mischevious Heart, Magic Mirror, and the decline of Spinblockers.
Excadrill: I run a Rain team, and Azumarill, so my team is Anti-Dory, but Azumarill and Conkeldurr both easily check Excadrill.
Latios: DRACO METEOR! *Everything common in the metagame except Ferrothron, Jirachi, Skarmory and Excadrill dies instantly*
*Switches out, woe betide you if they have Magnezone*
*Comes back in first chance it gets*
DRACO METEOR! *Your Steel type dies*
Proceed DM spam all over your team.
Latios needs to go.
Reuniclus: Ive not seen that many. It demolishes Stall, and Trick Room varients are good against HO [But worse against Stall]. However, I don't think it's broken. It may wind up Uber because it destroys stall, which has been the 'top teir' playstyle for the last 3 generations, but maybe Stall is just not 1st place anymore?
Thundurus: Not broken in the least bit. The worst it can do is run a Nasty Plot set, and even then, it's rather frail, and SR weak. Priority *cough, Azumarill* finishes off weakned ones, and you just smack it in the face when it sets up. IMO, Tornadus in the rain is worse.