Yeah S&S indeeds needs some buffs. It’s very risky, very low reward, and very situational despite having invincibility.
A neat trick though is to try and use atk+:s: as your invincible move in some scenarios, you can cancel to hyper SRK during it’s invincibility frames to pad it a bit more to confirm if you’ll get a punish, or simply DHC after if you don’t get it.
I use Stars and Stripes a heck of a lot. Point Wolverine at the beginning of the match? SHORYUKEN! I do it raw + assist call. I don’t play that, lol. I ain’t trying get dive-kicked by no one. Couldn’t care less what the character’s tryna do. Ask @intuitive2011.
In all seriousness though, it’s Caps best (re:only) anti-air. It might pale in comparison to other uppercut moves, but then again Cap isn’t meant to be a top tier. It/He could definitely use some buffs though.