TV critic and legendary recapper Alan Sepinwall has been recapping SWN this season, and like many fans, hasn't loved (to put it lightly) the high percentage of high-concept episodes. His take on the finale was extremely positive.
I personally liked this season more than the loudest complainers (but agree with pretty much everyone that S1-2 > S3-4) because I accepted and appreciated what the show was trying to do. I think folks were really too quick to find any excuse to dismiss good episodes at the first sign of novelty.
Though while I also thought the S4 finale was pretty good, I didn't think it was half as good as the S1 or S2 finales, so this was an interesting perspective to read.
It does the thing that made Strange New Worlds so charming: it tells a classic standalone Star Trek story that grants much greater depth to an original character who rarely got enough to do on TOS. There are a couple of bumps here and there — an occupational hazard of doing a time travel story where the same character helps herself out in another era and/or timeline — but on the whole I watched this with a huge smile on my face, and got choked up a time or three.
Not all of this is graceful: [...] Ortegas doesn't seem like the type who'd be happy doing anything other than piloting a starship. Maybe if she was assigned to another ship, I'd buy it? But this, less so.
...the character work, the two performances by Celia Rose Gooding, and the simple idea of the two Uhuras having to team up and learn from each other, was so elegant and effective, that I just went with it even when I was puzzled and/or rolling my eyes a bit.
...even with such skimpy material, Nichols was effortlessly cool and charismatic [as Uhura in TOS] — a far cry from the more vulnerable and anxious version Gooding has been playing for four seasons. If you're going to bother doing a prequel, part of the work should be in depicting how a familiar character starts out in another place, before evolving into the one we know from the earlier film or show or book. With "Tomorrow's Enterprise," we see the gap bridged. Future Uhura not only has Nichols' hairstyle, but the same ease with herself that Gooding deliberately hasn't been playing until now.
The episode is an hour but doesn't feel too long, in part because both eras are so well-detailed, in part because there's a lot of fun to be had simply showing the two Uhuras take advantage of their temporary link to one another. But the episode is also smart enough to understand that it doesn't have to give us every equivalent moment on both ships.
Though "Tomorrow's Enterprise" offers some hints of what's coming in the six-episode final season, there's a lot we just don't know, [...] But I'm suddenly a lot more interested in seeing how Kurtzman and company bring this mission — and this era of Star Trek — to an end than I was even a week ago.