I'm not gonna argue this too strongly in either direction, because hey it's a UI-less video who even knows, but there are numerous old actions that don't really (seem to) have an interaction with the new abilities that were just shown "because".
See: Spirits Within, Inner Beast (arguably just demonstrating difference from Wrath and Abandon), practically of all MNK's segment (Howling Fist most egregiously, otherwise just spamming to GL3), Jugulate.
Unless those are all seeing unmentioned buffs/adjustments, like Jug will add to Huton timer in a certain Kiss or something. I think it can be assumed also that one of the MNK actions was probably a oGCD stance change which wouldn't matter with PB on <_<