I'm pretty sure that FB adds more height overall now. I saw in the Korean video that a person could do a no-wall Dash AS CBD(3) FB(2). That's probably going to add a lot of (illegal) possibilities.
I know that OB allowed a 1 or 2 hit decay delete. Korean videos show that LGF(1) against a wall seems to add more height, but I haven't seen it decay delete yet.