I'll never be happy with that scene even given the soft-hearted context, but they couldn't very well have the fan favorite character (by a HUGE margin) undo all the gaslighting they set up to try to convince players to love Venat. The last part though, I absolutely do not accept. Emet was in anguish in the Hades trial that the WoL was using the power that had destroyed their world, then he's going to turn around and praise Venat at the end? F outta here with that.
The long answer is I would've fundamentally rewritten everything involving the Ancients because I was unhappy with how the moon, Zodiark, Elidibus, and Elpis were handled just for starters. This isn't even getting into how thematically EW was a bust for me or that outside of two zones the Final Days were a whole lot of nothing when they should've been used to give the sundered a greater appreciation of the apocalypse the Ancients had to endure, instead it wasn't any worse than any given calamity.
The short answer is everything could've remained the same except Elpis ended in an AU (where Venat gets to maintain her likeability) while in our timeline we treat Hydaelyn as a reluctant ally, condemning her actions but having no choice but to follow through the path she's set forth.
Part of me is loathe to remove Elpis and, let's face it, Elpis hard carried this expansion. I think without it and Garlemald, EW gets ranked equal or even lower than SB. However, what I really wanted from EW were first person perspective flashbacks as Azem. While I loved hanging out with Emet and Hythlodaeus it was as a "familiar" and I had to, once again, listen to stories about my past self while being treated like I'm not that person. Perhaps if we'd been allowed to visit Emet in the aetherial sea (since Hydaelyn hints to us very early on that she ushered him there) we could've tapped into his memories and he could've coached us on how to better use the Echo instead of Venat. Rather than playing babysitter to Meteion, it could've been an interesting mystery we had to piece together by looking through the memories of everyone who was there.