okay so ive been looking at the viability rank for a couple weeks now, and ive finally come up with what i think would need a change in how the metagame plays atm. also remember these are opinions based on my knowledge and my experience in the ou metagame, so feel free to discuss these rankings with me if needed.
A+ to S: ill start off with lopunny here, i disagree with this drop as it just doesn't makes sense at all too me. lopounny has perfect coverage in it's stabs only, which means that it has two moveslots for whatever it want, this basically gives it massive versatility. it can beat any playstyle as u can just adjust it to whatever ur team needs, it's got everything u should look after in an S rank pokemon, lopunny is just a high reward low risk mon no matter what.
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A+ to S: this change might be very discussable but ill bring it up here anyway, both off those genies is a massive pain to any playstyle whether it's nast plot, calm mind, rock polish or just mixed sets. they are extremely hard to counter and for bulkier teams u will basically only be able to soft-check them, both have amazing move coverage, amazing stat boosting moves, and enough speed/utility to basically threathen any playstyle. im ranking those two for S rank because they are extremely hard to check, they are low risk and hard to play around.
A to A+: this one should have raised ages ago, charizard y is basically the hardest pokemon in the game to switch into, it's a nightmare for bulkier teams they will basically fall to it no matter what if they can't counter it, and if u counter the speciall set u lose to the mixed dd set. at least when im facing this pokemon it's possibly the hardest pokemon to face especially if u can't counter it. it's easely high A+ rank materiall, it's easy to support as hazard control is better than ever and pursuit trapping are extremely easy to pull.
A to A+: why this dropped im not sure off, but scizor is basically one off the more dangerous sd sweepers in the game due to it's massive bulk, amazing typing and great offensive presence. it's one off the few offensive pokemon that hard checks basically any diancie (most are protect/rock polish) and most fairies overall, it checks a ton off the meta with it's typing only, and are extremely easy to use and build around. mega scizor should go back to A+ rank as it has everything an A+ rank mon should posess.
A- to A: jirachi has deemed itself better than ever in oras due to it's ability to check fairies fairly easely, it's extremely versatile, subtoxic, sr setter, wish support, mixed attacker, cm sweeper, scarf, etc. jirachi also has amazing stats, great coverage, and amazing utility moves in healing wish, trick, toxic, thunder wave, stealth rock, u-turn u name it. jirachi should easely be and A rank monwhen being able to fit a ton off teams, any playstyle and having a good defensive typing.
B to B+: victini to B+ because it's very anti-meta atm, the mixed set basically shits all over balance teams, and the cb/scarf set is extremely hard to check for offensive and bulkier teams, so this raise shouldn't rly be to big off a deal.
B to B+: okay so volcarona has become quite popular after ben gay's spl game, and there is no doubt that volcarona is amazing in the metagame atm, as it checks fairies, runs through any playstyle there is if given the chance to do so, it's easely B+ rank materaill and i would like to see a raise.
B- to B+: ok so my last change would be serperior for now. this pokemon are extremely hard to play around if ur team is either weakened, u don't have a talonflame/heatran (lol srsly tho) then u will just get brutalized and humiliated to the max by this pokemon, it's simply ridicoulus how insane this pokemon is u let it boost, every turn it's harder to stop, so this raising to B+ just because off sheer brutal power shouldn't be to much to ask for, it also has ways to keep itself alive in synthetis/giga drain and has decent defensive stats.