I don't remember my first TBBT episode, but it was either the 1st or 2nd season, and I eventually became a huge fan, never missing an episode, plus watching every weeknight in syndication. A few seasons ago, likely from a combination of the characters, and myself, growing older and changing, my interest in the show faded. And this season I think I only watched once, until last night. So my "review" is based on limited knowledge of this season.
Likes: Loved the elevator working. Loved Amy's makeover. Loved the restaurant scene with Sheldon & Penny. Liked seeing Howard & Bernadette's kids. Liked that Sheldon (and Amy) got the Nobel Prize. Liked that Penny seemed ok about being pregnant. Liked seeing Cinnamon.
Dislikes: Hated that Raj is the only one still single. Disliked Stewart's incompetence, as has been already posted, he's been taking care of the kids since they were born. Confused with why Sarah Michelle Gellar was a guest star. Missed Sheldon's Mom. Missed Will Wheaton.
I know it's impossible to fit everything into a finale, and as finales go, it had more positives than negatives. However, and not sure if this is good or bad, it didn't really feel like a series finale.