im just gonna break this down.
potemkin was a terrible character in X, he had nothing. he was honestly tager: a useless gimmick. the two most important changes potemkin received were the following from X to XX -> Hammerbreak and hammerfall FRC. these two things ALONE made him a decent character because suddenly he better methods of approach, safe, repeatable pressure that actually wasnt braindead to beat etc. hammerfall being a good staple of his movelist transformed him from a grappler with useless shit to a character who had to work but had the necessary tools to win because if someone wanted to block, they could and potemkin got multiple chances to mix them up instead of a grand spanking number of one.
the reason thats IMPORTANT is because the single hardest aspect of playing a grappler is getting into a range where you can actually do something. once you do, a grappler should be KING FUCKING SHIT of that range. grapplers need good frame advantage, jump prevention (collider is not this by the way) and a way of keeping pressure without sacrificing their lifebar and momentum if the opponent has skill, aka they need safe, repeatable pressure (with limits). these are singlehandedly the most important tools a grappler NEEDS to be good. potemkin HAD all of these besides safe repeatable pressure. hammerfall frc and hammerbreak did just that.
now anyway, why was potemkin bad in XX and #R? because other characters were downright broken. i dont mean like, "s tier is good and shuts him down". I mean like these two games tierlists were dictated by just how bad of a job arc systems did designing their characters (though the cheap shit kind of balanced out in a cool way in #r). like, eddie and slayer basically fucked those games up so hard that your character strenght was "how badly do you get raped by them". i forgot the rest of the good characters but basically XX wasnt too discovered and eddie was so broke in XX that by the time #r was around people finally discovered how just how broken eddie was. like if people wetn back in time in the laters days of #R and made a tier list it would look like this;
SSSSGODSSSS++++S
eddie
s slayer
a who honestly gives a fuck?
thats the xx tier list. XX and #R werent really balanced games or anything, but potemkin was a good game trapped in "land of how you beat eddie" ps eddie still rapes potemkin because of his character design alone.
anyway then slash came out and most characters got put into check and potemkin suddenly became mid tier. then they fucked up and gave potemkin comboable slide head and he because high A in ac despite probably being solid without it. he has like the best oki in AC besides like slayer and millia because of slide head meaties and shit too. that shit rapes characters pretty damn hard. hes a solid stable character unless the matchup is eddie though.
part 2: tager
tager has literally nothing that makes a grappler good. he has a 720 and also does damage and has attacks. thats seriously it. he has no qualities of a good grappler. he has no jump prevention, his only safe repeatable pressure involves 236A RC or ceases to be pressure at all, his damage is mediocre outside of 720. but oh yeah, he has 720, so making him good would be the STUPIDEST MOVE IN THE WORLD. so tager will forever suck and have these fundamental problems.