No, the source of Sheik's disproportionate strength lies entirely in the d-throw uair 50/50. It allows her to subvert her ordinary kill option weakness that is otherwise prevalent throughout her design, all at the hands of her terrific grab game. It's exactly the same as pre-patch Diddy, but only half as much of a problem. (Literally and figuratively.).
Ultra late but IMO this is one of the best aspects of Sheik's character design. For the "best character", she's someone you can't randomly pick up and start crushing with because you need serious fighting game fundamentals to be able to consistently hit the 50/50 at the high level. This is confounded by the fact that if you mess it up too many times it stops working.
IMO we should focus on archetypes when talking about characters. Sheik is a ninja, she has incredible stage control and many ways to put other characters off balance and punish them for mistakes. The drawback to this is her disadvantage state. Sheik is a fast-faller, light, and one without a great combo breaker, if you get in on Sheik you can capitalize hard.
My main issue with Sheik is her offstage game. Edgeguarding people (needles, fair, bair, needles --> bouncing fish, dtilt the two frame->uair ->follow up) goes with the archetype, but IMO her disadvantage state offstage shouldn't be nonexistent.
Vanish grants intangibility to Sheik 17 frames before she actually teleports, and it's reach means that stealing her jump often results in no death the way it does for most characters. IMO Vanish shouldn't grant random intangibility so characters can go down there and spike her and Vanish's teleport distance after the original leap should be slightly less. These are kind of drastic, but I think they're of such importance that it'd be more than fair to give Sheik new buffs to trade off.
Crazy Ideas
- Vanish doesn't have intangibility frames before she disappears.
- Vanish's original explosion does more damage, killing earlier.
- Vanish doesn't send Sheik as far after the first explosion.
Here we go with more complaints (like after every major lol)
Did no one see the set where I played Mr R with Diddy Kong and won at G3? Or maybe any other tournament where I beat a top level Sheik in a solid fashion effectively avoiding down throw setups, needles and edgeguards and like everything LOL with Diddy Kong (a bad match up too btw, it's not a close one like rosa sheik or sheik mario etc)
I think there's a difference between addressing issues with character design, calling a character broken (none really are, maybe with customs on), and bug fixes.
Luigi is a pretty good example of addressing character design issues, and Greninja is a good example of bug fixes. Both characters got worse as a result, but in the later's case it wasn't necessarily an intended consequence. 1.1.3 broke a very long tradition of Pacman getting a bug fix every single patch, people don't really pay much attention to it since most of them haven't changed the way the character plays competitively, for better or for worse.
To that end, I think there's a big difference between someone who gets upset because they lost to a character in a tournament, and someone who has a specific issue with a character, i.e., taking issue with Vanish's random intangibility. You can think that an aspect of a character is weird without thinking that they're broken.