The Houston guys got it at PZ on Saturday.
Arcade UFO got it today (Monday).
One thing I did notice is that they were not kidding when they made his combos easier to do. You can do the autocombo super immediately after a 623B. You don't have to delay the input at all (even though it wasn't that hard in the first place.) Also yeah, you can do the super off either high wall bounce or low wall bounce.
To me, I use the B Nail glide when I have them poisoned. A Nail damage is pretty good now so I like that.
Steel Rain is useful to use when the opponent is knocked down. The new super start up is very fast and when I did use it, seemed like safe on block. So good to use so your opponent doesn't get too greedy. Theme song in arcade is pretty baller but everyone knows that.
Edit: I also wanted to add that managing nails is even more important now since the rounds do last that much longer.