Do the Pits get any use out of this?
I know you can get grounded footstool to D-air into a follow-up, but would this be optimal in comparison to just grabbing or doing something else out of shield?
Dair to follow-ups only works at mid to high percents. And by that point, the only grab combo you'll be able to pull off is d-throw to up-air (unless you're playing against a fast faller or heavyweight, but even then, rage and DI are a thing) which would do 16% (assuming you land all hits of upair) while d-air to follow-ups do around 17-22. (again, assuming you land all hits of each follow-up)
Dair to nair does 18%
Dair to Fair does 17%
Dair to Dair/Dair to upair does 20%
and Dair to sweet Bair does 22% and dair to sour bair does 18%
these are all true combos
what do you guys think?
EDIT: another thing to note is that when they compared frame data at the part with Mega Man and Shiek, since Pit has a frame 5 jump-squat and not frame 4 like MM, he would have 9 frames (theoretically) or 11 (realistically) which still can punish in the situation they showed, just that it would be harder to punish by 1 frame