With the power given to me, a mere pleb in the community, I vote for Genesect to be banned. As several reasonable people said before: Gensect with its wide move pool, amazing stats and uneven distribution would make PvP an even bigger clown fiesta than it is right now. The fact that Download is not coded properly and would boost his U-Turn power vs defense walls makes the whole ordeal even worse. Also Genesect is a one time encountere Pokemon, so you have a hit or miss chance. People with failed sync or bad IV Genesect can't or won't use it, while those with amazing Genesects are gonna wreck PvP.
Gothitelle should stay banned. It hinders team creation and is legit unfair as you can just switch vs counters and wait to catch another wall. People saying Gothitelle helps with stall should seriously rethink their words. Gothitelle works amazingly in stall teams and therefore encourages them. There are so many other wallbreakers that are not Gothitelle.
As for Blaziken I do not see any problems with it in the current Pro meta and it should remain unbanned.