Yea, well Duality uses it a bit vaguely so I wouldn't get my hopes up. I think they really just meant any bonuses associated with the combo, but I won't complain if we keep the potency.
Your point about the positional bonus with AE and ArC is interesting. I forgot that it's added on to the base rather than the combo.
I think it's a good thing so that weakest weaponskill doesn't get more benefit than our finisher.
EDIT:
Oh the full patch notes are up.
Might clear up some things.
And.....Nope.
I'm in-game, aww yeah.
AE is 100 potency by default
Combo Potency is 240
Rear Combo Potency is 320.
