The problem with defense in the game is just typical NRS logic. It WOULD make sense that because backdashes have +30 frames of recovery, and within a game where footsies cover half the screen, that backdashing would be treated as a normal movement, but no...you have to be mindful of when to break/run/block break/use an interactible, because SHOULD you want to distance yourself after, you either can't or lose all stamina.
Imo:
-backdashes shouldn't require stamina
-block breaking shouldn't require stamina, nor two bars, just one
-short distance backdashes like Kenshi, Mileena, Goro and so forth, should be 27-30f in recovery, maybe slightly less given how little distance they travel
-Absurd backdashes like Sub, Kano, Quan, etc. should have 35f of recovery, if not a few more given these same characters, Quan aside, with easy mode safe footsies on top of the backdash they have
-NJPs should all be made unsafe regardless of height. If they're gonna keep WU NJP a thing, there should be SOME sort of penalty for it
Just my opinions to actually adding defense in a game that is clearly only offense oriented.