For the first few frames(5 i believe), you're still counted as grounded, unless they changed that. On top of that, unless in extreme cases, most d1s will knock her out the air before she even jumps. I'm in the lab with batman, and d1ing her at the end of the roll animation anti airs her or simply punishes. Bare in mind, his d1 is garbage.
Maybe for you, but to me the animation is very distinctively different. On top of this, the roll recovers in at least 32f(according to the in game frame data) How are you not reacting to this?
Also I want to note that ij1 whiffs on crouching hitboxes too, so even if your d1 fails to punish, you'll still be safe anyway.
It does low profile highs, but whos mids does it low profile? I'll test other characters but literally every single one of batmans mids punish easily.