Max th7s don't need to 2-3 star early/mid th8s. They might be able to do it with a GiWiPe, but th7s' offense shouldn't be almost the same as th8s' offense. Early th8s, like all other early town halls, will have to upgrade for a while before they gain the ability to attack their own town hall, upon which they will get dragons.
This is why I propose a alight level 1 PEKKA nerf. I will put this in an edit in the OP.

