Aight as resident rainmaster and the only one to use water (to my knowledge) I want to speak on a couple things. CharX i think is entirely fine as though its typing is pretty baller its speed tier is lackluster in this format and vcreate does it no favors in this regard. Yes it hits like a truck, but it leaves you really vulnerable to countersweeping/setup. Thundy MIGHT be banworthy, but atm I think it's just amazing, not broken, as its just a really good utility mon/pivot for the most part. Keldeo however I think deserves a suspect, as on bug its pretty damn amazing, stopped by little besides flying/psychic/electric scarfers, ditto, and tflame. On water, specs keldeo destroys almost anything. I have played against a lot of teams where keldeo coming in meant them sacking something, straight up:
252 SpA Choice Specs Keldeo Water Spout (150 BP) vs. 252 HP / 4 SpD Eviolite Chansey in Rain: 351-414 (49.8 - 58.8%) -- 99.6% chance to 2HKO
that's ridiculous. Granted this only works on dedicated water teams, but I've been using one for a while and it works damn well. Keldeo becomes an OU kyogre with water typemons. In other typemons it "merely" gets bonus coverage, boosting moves, switching moves (volt switch, u-turn specs keldeo) and secret sword destroys most special walls.
Shadow tag: get this the hell out of here, I think. Nobody has tried perish sets far as I know yet but they can exist and they are bullshit, along with things like quiver dance goth, spore/dark void goth, double stag teams with parting shot, etc etc etc. Yes this means wobb too (because it can get really stupid lets be honest). I may be against banning stag in ubers but this ain't ubers and that aint fair. needs to go imo.