Finale episode was Ok.
Random thoughts ahead:
I didn't like the kung fu, and the shenanigans in the turbo lift cgi nightmare was just laughable.
The stuff on the Dilithium planet was good, but had some of the worst technobabble I've ever heard in Trek. Saru was good in his role as a mentor to Su Kal.
Finally we had the rest of the Starfleet actually doing something, and I do like the futuristic ship designs.
But the ending was mostly great. I'm glad that the Burn "mystery" and The Emerald Chain storyline is behind us. I hope that they get to a comfortable groove from here on out. I think they did a good job with the world building this season, and I hope they get to tell better stories in it next season. There is a lot that they could do with this new era, and the Trill and the Vulcan episodes show that they are capable in writing great episodes.
Like Kotowboy said, rest of the cast need some spotlight as well. We need more standalone, problem of the week episodes.
I hope Saru returns next season. He is easily the best character in the show thus far. Random crackpot theory here, but would it be cool if Michael gets to keep the captains seat on Discovery, then Saru would become the captain of the next Enterprise?
This was an Ok season, and I do hope they have better stories in store for us next season.