For the record, I gave this a 9. Yes, I am finally weighing in. I bit the bullet and re-watched from start to finish over the weekend (I was afraid to).
I thought it was a beautiful ending for the characters, and the final 20 minutes was beautiful and amazing and satisfying, and maybe my favorite 20-minute stretch of the whole series. I was pleasantly surprised that they actually found a way to make the Sideways story work when they brought it together, at least in my book - this was better than having it be some alternate timeline that actually won out or lost out. Upon re-watching, I saw that they continued to hammer home the key themes of the entire series: faith versus science, life & death & re-birth, live together die alone, and letting go of the past (whatever happened, happened). I am cool with that.
The minuses for me were that the awakenings became a little repetitive and I agree with the general sentiment that they could have used a little more time to give us more direct answers to some of the nagging mysteries. A lot of those mysteries did not need a ton of time as they were less relevant to the story, and I think if we dig deeper into the show we can connect the dots and find somewhat satisfying answers. I mean, isn't that our job? But I do think they could have balanced it out a little more.
Otherwise, I loved it, and I am happy with the way it ended, and I am one day going to be able to move on and let go.