It's there in the English version, but I'm just being pessimistic. No reason to not assume Iello will find some bureaucratic reason to not support including it.
Not that it matters now that you all but practically confirmed you're currently not even working on Power-Up in any way.
Barring any quirks in the programming language, Thoun wouldn't have to program much of anything. This is just disabling the existing function to distribute costume cards at the start of the game when the 1st edition flag is toggled.
Not saying this is more important than new features, but currently we already have 4 of the 6 micro-expansions (counting the one exclusive to the Dark edition) up and running. I don't think people are waiting with baited breath for the berserk die and the wickedness counter to be added so they can finally hop on to the KoT train instead of waiting for Power-Up.
And assuming the latter two micro-expansions are among the 4 planned updates, I'm note sure what the other two are since I didn't find anything on the forums indicating some kind of BGA-exclusive expansion.
EDIT: Also, I see you already made a similar suggestion when Halloween was added and didn't get any feedback.
