Having already seen the ending raws, I'm somewhat disappointed, it explains why the author decided to show the future much earlier so that we knew to keep our expectations low.
Wth is with people who feel like they have to hint at (or even deliver) untagged ending spoilers? If you want to be spoiled, whatever floats your boat. But don't do it to everyone else.
Honestly thinking on it. This is the end of an Era in a lot of ways. Several long running manga are starting to end about now as well.
Though I sort of wished that they were able to end it on 400 instead of 379. It was a great ride through the years though!
I have low expectation, I would consider this to have a good ending if he somehow (a) make a clear solid choice (b) not interrupted by anything silly. Please don't go "I can't choose anyone" or a fireworks somehow turning them deaf.