Nope. moving it from 18 to 12 would be a mistake and way to powerful for 12 ability.
Also Let me point out that enhancement tree passes are targeted at making class viable not making it a good splash class. The benefits of a splash here and there are all fine and well, but asking for things like the proposed Core 18 to be bumped down, are just the first step for meta-gaining the class right back into irrelevance.