Yep. IMO, 5men gren meta or Ostruppen meta (or Elephant meta in 3v3/4v4), makes OST viable/playable. Otherwise they are UP. But they are not even close at being OP.
OST vanilla is kinda better than SOV vanilla pretty hard considering the recent buffs ost got to teching and several other stuff like the 7 man nerf the lategame grenadier buff and so on...
OST with ostruppen dunk on the soviets soo hard that they just cant do shit
OST vanilla is somewhat worse than UKF vanilla cuz OST vanilla is almost 100% reliant on how well you play your sniper earlygame... if you lose your sniper youre gonna have a terrible time against UKF...
OST with 5 man plays with UKF on an even playing field...
OST vs USF well... lets just say USF is considered the best faction ingame for a good reason...
in any case id rate the factions at their maximum/meta state as
USF>UKF=OST>OKW>SOV
sov takes the cake as the worst faction because your whole gameplan vs OKW revolves around the enemy not using panzerfusiliers... if they do then youre fcked... conscripts will get slaughtered and the M3 wont save you...