Id say at the end of the day this pack is for making a game, if it needs to be altered to fit the game being made, thats great, but if its being redistributed ( edited or not ) in isolation then at that point it feels like less about making a game and more so about just trying to garner attention off someone elses work, and thats no fun.
Viewing post in Free - Whimsy Hallow Asset Pack - Dungeon comments
So if it is your opinion... I understand what you mean but in this case just use your custom license instead of saying it is CC0 because CC0 is about free cultural works, just as like about FLOSS software. Did you heard about it?
Oh, and on OGA people expect CC0 means CC0 so... I've already made a comment there with link to this conversation...
The downloading of these assets from OGA has been disabled for now. https://opengameart.org/comment/106212#comment-106212 Let us know what you decide.