When Cinccino got Skill Link, I was convinced it would be way too overpowering, just from running calcs and playing some of those DW NU tournaments we had. In reality though, it has been somewhat underwhelming. The hype around it meant everyone actually prepared for it, innovating with items such as Rocky Helmet, and as such it has fit very nicely into the tier. NU has certainly become more offensive however, and the value of priority and extremely fast Pokemon like Swellow has shot up, and this is in no small part due to Cinccino. I certainly think the metagame has, in part, centralised around it - but this is just a natural trend when such a powerful threat emerges.
As for Golurk / Emboar, these two are in a similar boat. On the surface, it is easy to say they can 2HKO everything with the appropriate move with entry hazards down. However, in reality they are slow, somewhat difficult to switch in, and how dangerous they are completely depends on the users ability to predict. Even then, the fact they have to resort to Choice Band, and by that items very nature thus risking themselves becoming set up fodder, it is much harder to declare them overpowered. I do not think a vote is necessary on these any time in the near future, but they are certainly very close to the top of NU threat wise.
Alomomola really should not be considered for suspecting in my opinion, its a solid Pokemon, but easy to play around and easy to take advantage of it. Regenerator is certainly a boost, but nothing near enough to push it over the egde. As for Swoobat, I have not played either with it ot against it enough to form a valid opinion.
Zangoose is, for me, the Pokemon I would most like to see voted upon. Its sheer power is astonishing, and very little in NU can avoid a 2HKO from it. It sets itself apart from its similar cousin Ursaring with a very good Speed stat, and indeed is unique in NU being that powerful and fast. I think the best set is the 4 attacks with Facade / Close Combat / Night Slash / Quick Attack, which hits everything in NU, as well as being able to circumvent Sucker Punch with Quick Attack. While Zangoose is admittedly weak to priority, as well as somewhat difficult to switch in, once it gets in something is going to die. Even if you are packing Haunter or similar (which is a great check), you always run the risk of being hit by Night Slash as you switch in. This set is mainly dealt with by either running Alomomola, or packing your team with priority.
The problem I have with this is, running 3 or so priority moves on a team seems like overkill to me, even in such a frail and offensive metagame, which has partly been developed by Zangoose itself. The fact that Zangoose can also just switch out of priority moves also makes it an incredibly unreliable way of dealing with Zangoose. Samurott, Gurdurr, Swellow and other common users of priority are not necessarily hard to switch into either, all sharing several hard counters in NU. Not to mention any sort of defensive team is almost required to run Alomomola to deal with this monster (note that Alomomola can either be amazing one match, and turn into a complete liability next match), and you have what is, in my opinion, an unhealthy Pokemon for the metagame. Alomomola also get murdered by the Swords Dance set, as rare as that is.
Finally that brings us to Amoonguss. This Pokemon is no doubt a huge threat in NU currently, being on a massive amount of teams (I will be looking forward to the stats on this). Access to Spore means it can cripple a Pokemon in just about every match, and we all know how dumb Sleep is in gen 5. It is also incredibly hard to wear down, being able to heal itself as it switches to an appropriate teammate if threatened, and access to Clear Smog prevent set up sweepers from breaking through it. This is another one of the Pokemon that has warped the metagame around it, and in every game I have played with it, it has just made the match worse. Even offensive teams can easily fall back on Amoonguss, and Amoonguss vs Amoonguss match ups are unholy. Actually "countering" Amoonguss is hard due to Spore, and it kind of makes me wish for Magmortar again. I am still unsure what should be done about this, since it is no doubt moving up next tier cycle, but I would not complain should it leave the tier early.