1,2,3 - The factions don't have much to do with the drama about the Gods and the wheel. People, including myself, seem to be satisfied enough with the faction plotlines.
As for 4, ending slides are not a substitute for having something to do in the plot of the game itself. And the conversation with Eothas is pathetic, you don't seem to need any stats, items or knowledge to persuade him. You can try to persuade the literal God of Redemption to annihilate all life, and if you fail to persuade him by giving a lame non-reason, he still does it anyway. It's ironic, you are finally granted agency with Eothas but it's retarded: you can persuade him of anything for no reason. It's like turning up to the Master in Fallout, telling him he's wrong. But you don't say his mutants are sterile and you don't have the evidence of it anyway. So he ignores your non-existent argument. But then he ''feels doubt'' and self destructs anyway. That's literally how bad the last conversation of PoE2 is.