I have never seen an EX primal nerfed because of the fact that "clear parties" are traps that are basically learning parties where everyone is hoping for a carry. No idea what the point is with your strawman about boost pots; clear parties have ALWAYS been pretty terrible because everyone in them is convinced they're not the problem, the "crappy pugs" they get are, and when everyone in a clear party thinks that they just wipe three times and disband when they don't get their easy carry.
