Without having any idea of what a pugmire is, you have a point: yes of course there will be gamers content with 5E.The Crunch constraint is part of what makes 5E better than prior D&D... to a point. After 10th level, the 12-16 abilities (and 10-15 spells memorized) hit a saturation point for many. I thought I was relatively rare, but the success of Pugmire (which keeps the same upper metric on Proficiency Bonus, but rescales to 10 levels) says I'm not alone.
But these "casuals" will never play a Pathfinder game. (That's not a slight. I am convinced I am staying objective fact when I say Paizo will never appeal to someone who truly believes the light level of crunch in 5E is "just right"; unless they make a completely new game, of course; one that does not resemble the PF2 playtest with its nightmarish assault of feats at all)
So let's focus our discussion on those gamers who like 5E, acknowledge its fundamental fixes, but are ready to sink their teeth into something... crunchier. Especially since in the short-term, Paizo is our only hope