Make Xenophile/Xenophobe resolutions, changing up migration. Xenophiles can eventually force free migration pacts between all members, Xenophobes forcibly shut it down entirely.

Add proper trade resolutions to benefit megacorps more.

Allow unification against Devouring Swarms, Determined Exterminators, and Fanatic Purifiers, like lesser crises.

Take Greater Than Ourselves and make it an already existent feature for all empires, then make whatever you replace it with as the Egalitarian resolution something else.

Allow a resolution to be put forth that declares a federation to be 'the Galactic Peacekeeping Force' or something similar, with corresponding boosts.