Now that the fifth and final season is over, is any aspect of it you would change to make it more of a satisfying season in your eyes? Keeping Etta live? More flashbacks of the Fringe team's lives pre-Observer invasion? More of a focus on Broyles and Nina?
I would drop the entire future storyline and the Observer invasion, instead I would use the first episode to restore the blue universe and retcon the shit out of season 4, the rest of the series will deal with the red and blue universes working together like they were supposed to at the end of season 3.
There just should have been a better transition from 4 to 5. And EVERYTHING. I just never connected with it.