Wow! That was awesome! My first 10 for the series! Although, I think it probably deserves a 9.5. It had a little bit of everything in the best possible way. Action, relationships, sacrifice, etc. All of it working together for the story. Minus half a point for hinging on an unexplained time travel paradox. Discovery followed the signals initially and it gave them what they needed . . . for Burnham to be able to send the signals.
No timeline reset. But, yet an excellent rationale for no Spore drive and no Michael. Time jump with no return. All fits my prediction! Also, no Borg, which I also guessed! The only surprise is that they didn't tease us with where Discovery ends up.
We also saw why they had to front load all the goodbyes into part one. There was no break in the action for them in part two! The only mistake was not airing it as a two hour movie. Streaming them separately left those goodbyes awkwardly hanging out there mostly by themselves.
Extremely satisfying conclusion to an excellent season. The best season of Star Trek in a looooong time. Since the end of DS9, so twenty years. Hats off to the Discovery cast and crew!