Yes, and a lot of the "kill set-up" are weird. Most sheik's games are fair until the opposent reach a fair kill percent. I saw aerial needle ->BF but i couldn't make it work as the ennemy can AD every time.
What I've found while second-ing Sheik:
F-throw + U-air = This is one of the easiest, but the reward is low. Kills at... 130%-140%-ish with rage if I'm not mistaken. Good luck killing D3 with this.
F-throw + BF = Not guaranteed at certain percents, but it sometimes works. And also, put that double jump to work in conjuction!
B-throw + BF = Surprisingly. Sheik's B-throw is amusingly weak, but it can combo to BF! And it kills at 100% at the edge of the stage.
F-throw + F-air = Lel. I don't remember when it kills but this is basically a last-resort.
F-tilt + U-air = Read F-throw to U-air.
U-tilt + Tipper U-smash = Yes. You read it freaking right. She can combo to tipper U-smash. I have only seen this at Sheik boards but it works on 70%-ish... And doesn't work on higher percents I believe.
D-throw is basically useless at kill setups. It works as combo starter but F-throw does better overall. I haven't looked much on needles, but I'm having a hard time believing she can combo to BF given its end lag.
And also:
Most sheik's games are fair
Put a middleline between [f] and [air] and I'll believe you.
Sheik DOES struggle to kill. It doesn't matter how many bazillion kill set-ups she has if she can't kill onstage before 130%-140%.
BTW, this is a question I've been meaning to ask, but how would you guys balance Sheik and Rosalina (Because both of them trash on some characters)? Sheik I've been playing as, and I find her needles, call me crazy, quite honest. I mean, yeah sure. She taps B twice, you take 1%. So? 1% buddy. Fully charged? 7%. That's barely higher than Luigi's Fireballs... Unless I can find evidence that she can combo to BF somehow because I suck and can never get it work I don't think nerfing it hard would be neccesary... The end lag is fairly justifiable too (But then again. I look at Falco's Blaster. Ugh). But I disagree on 'making it so it doesn't flinch'. ANY projectile that doesn't flinch people would basically end up as a worse Fox's Blaster unless they do 20% per hit.
The only thing I disagree on Sheik's needles are on how they do knockback at higher percents. I think they can do something like 'decrease their knockback growth so they don't do knockback till 300%' so Sheik doesn't juggle people like mad even though they're miles away from her feet. I think simple flinch can make it good already... or flinching is something I've been underestimating lately?
Rosalina... it's hard to balance her honestly. Solo Rosalina suck, sure, but Luma adds an entire whole new gameplay on her. Nerfing Luma would be understandable since it... just seem too strong as of now, but I'm not sure where to hit it. Crazy knockback, sure. I have heard tales of people dying at 40% to Rosalina's U-air (Not sure how that even happened. Maybe they got hit by both of them at the same time?), but perhaps that would do alone since I don't remember Luma having Ganon-tier knockback on any other of its attacks. Maybe reduce its health? Or make it so it acts slower when Rosalina is in hitstun?
I'd be interested to hear people's opinions.