This was a very good ending to, and by far, the best episode of What if..? This particular episode brings together everything that we saw earlier in the show and we finally get compensated for some of the bad/abrupt endings of the previous episodes.
Every single thing about this episode was enjoyable. It was fast-paced (not rushed), genuinely funny and packed with surprises. The action sequences were quite thrilling and the animation, as always, was top notch.
I can go on about these things but the real winner of the episode is the multiversal crossover and the chemistry which was created between the characters within a span of just 30 minutes. It was like watching a mini avengers movie. We get to see some character interactions that we only wished we'd seen in the live-action MCU projects. And that was very interesting to watch.
The episode did have a small issue where just one of the characters, feels completely useless and was unnecessarily present. You will know who it is when you watch it. But it wasn't like that particular character's presence was holding the show back.
Not only was this episode a fitting conclusion to the entire show but it also sets us up for season 2 and probably for the future of MCU. This show turned out to be a lot more important than I had exptected it to be.