This season I actually like the pentagon rule, unlike last season where it was greatly limiting. The limitations on number of accessible Pokemon is removed by a far more expansive list of legal Pokemon this season. The pentagon rule only further benefits the competitiveness of the metagame, as there was a ridiculous inequality created in previous generations by those which could or couldn't RNG, by enforcing Pokemon to be native to gen 6 it rules out 6 IV RNGed (legendary) Pokemon generally making things fairer for everyone and more inclusive.