I’m unusual, I think, in that the heart-aiming direction is what really matters to me when it comes to Star Trek. I can and do pick favorites among good and bad episodes or series, but I really fundamentally just want to see characteristically Star-Trek stories being told, and until I saw the final episode I wasn’t entirely sure the Discovery folks were even interested in doing that. The Mirror stuff really gave me doubts, especially the Lorca turn. But I think the final episode shows that they at some level get the core Roddenberry idea and are committed to being faithful to it. Once I can put my mind at rest on that subject, I’m happy to let a Trek show fully into my mind and heart. After that, I’m happy to quibble about creative choices, and I have quite a few about Discovery (my main one being that characters’ motivations, reactions, and thinking are oftentimes murky or implausible given the role in the various plot gambits of the moment). But, whatever; at least it’s actually Star Trek as I define it: stories that explore humanity’s successful quest for self-improvement and/or an against-the-odds uncovering of a modus vivendi between two potentially hostile parties. So, in that respect, I’m happy.
FWIW I also thought the Enterprise showing up randomly was kind of silly, but I suspect/hope they’ll dispense with that within the first episode for a minor point of canon reconciliation and it’ll be fine. It was preferable in any case to what I thought way more likely: some kind of crazy cliffhanger that left us facing a long hiatus with a feeling of itching incompletion.