“Who should go below them?”
Well… quite a lot of people I’d guess. Then again I only really specialize in a few characters so I don’t know the main changes from XX to #R for about half the cast. I can’t really say much about this, besides saying that the low tier is still Low Tier. It’d be far too huge of a response to explain why each character goes where, which I don’t have the time for right now. =/
IADing with Baiken was (and still is in #R) quite useless. Sure you’ve got j.S, but the priority on that is not great (not bad, but not that good either), it gets beat by a lot of things. It does have its uses on taller characters though. A much better tactic if you’re going to go airborne is IAD forward/back Tatami, or running j.HS (make sure you end up above them). j.HS has insane priority and range as long as you are attacking from above, and gives massive blockstun. Follow that with air tatami and then ground mixup (if you’ve got half tension) with TK Youzansen, into dust loop if it connects. j.HS -> air tatami doesn’t work as well in XX as it does in #R, though it is still worthwhile in XX.
Speaking of which… Youzansen is really only useful if you have half tension. If it ends up being blocked, which it will be occasionally if you’re facing a decent opponent, you are going to eat B&B if you don’t RC/Burst.
Abusing the 412S counter without FRCing results in getting punished, badly. Most characters can just do short attack strings and JC out of them as soon as they see the counter coming, landing behind you while you are still stuck in recovery / just blew 25% tension.
2D has lost a lot of priority and now scales back damage heavily in #R. I don’t know what your comment has to do with the unchanged S besides the fact that S precedes 2D/Youzansen in ground strings, which is commonly known.