In EA both skills could be used (in arena) for just AP. This allowed for cool and tactical shifts with surfaces. The release feels like it's missing this dynamic.

I instead propose that to counter the 0 source point cost, cool-down is set to 99 turns to prevent multiple use by same avatar in combat. At 99 it also stops the player from just spamming it outside battle without having to wait a considerable while (and minimises cheesing, because I know some players have no restraint).