Odd you complain about Pyrrha 22K and saying thing it over powered, but if any mention of Cervantes 22K its uncalled for. Pyrrha 22K is a going to be used at disadvantage but there are options you can do to deal with it, you can use horizontal mids or lows or TC horizontal. There are things you can do to still keep momentum. You can also back dash but then you lose momentum cause of being passive. I don't think Pyrrha 22K need a nerf but if anything were to get one I think it should be just be -10. If her 66A become -11 and 3B loses the push back
Cervantes 22K is countering everything. With build in step, GI all horizontal and body attcks. This move has good range, and has good speed at -i24. This move tracks to both sides. It give +6 on hit and KND on counter hit and is -10 on block. And your saying it does not need a nerf. This move can be spammed with little thought. And the way according to you to beat this move is to back dash and whiff punish. So I must always give up my momentum every time in order to beat this? It not alway damage that can be the problem it the properties too. Imagine if Ivy's 214B was + on hit and was -10 on block. That be completely broken. Cervantes' 22K need to lose it GI body attacks or be punishable on block.
As for bK for being + on block is again too much, considering all the other tools he has. There are not may many characters that tools that give + on block, the one that comes to my mind is Pyrrha Omega's 4B but it is slow at i32, but Cervantes bK is i25.
Phyrrha 22K is 85 DMG, has almost instant TC and is -7. Also combo in CE. You are complaining about a move with 25 DMG thats has been like this in basically any soul calibur and never has been a problem to my knowledge. Also it has no TC at all, so you can still grab him.
And yes some matchups require you to give up your momentum, its the same way how you deal with Pyrrha 22K Mitsu 4B, evading characters etc etc. I dont think thats something new. When i play against Ivy i also give up momentum when i anticipate 214B, 3B etc.
22K is nice, but no damage at all. I dont get how this can be a problem, but i others agree i dont care. I know franman uses it a lot along with bK, so thats probably where your impression comes from. But nerfing the few safe tools he has will ruin some matchups.
Concerning bK. What are Cervys options afterwards? I puts you in a normal mixup. Throws, unsafe Mid or unsafe Low. Its a normal mindgame situation, you can get the same damage for a correct read. Its not like Cervantes can pressure you with any safe mixup at all. Anything he has in this situation is risky to a point and by no means broken.
Its the same like after 4B BE, when people know how to deal the mixup again is quite risky. You can step into TC move to beat B+K and throw, you can GI, you can attack. But again for a correct read you get a lot of damage. Against the people i play a lot i find myself often just giving up the mixup, most of the time throwing because B+K is stepped so easily.
Cervantes is a hard Matchup if you dont play him a lot, but really broken only aB in certain matchups and 1AB damage. Imo.