I was torn between giving this one a 7 or 8. I went with 7 but it's a strong 7.
There was lots to like in this episode. Particularly the drama of Pike and Ash in the shuttle. Pretty good stuff there. Overall, I enjoyed the investigation of the time anomaly. So, red angel is probably (but not definitively) from 500 years in the future. I'm guessing there are two opposing sides. But, it's not clear. The story used both Stamets and Tilly to good effect--both in being able to see through the anomaly clearly and Tilly's advanced skills at math and using that for transporter coordinates.
From here, the rest of the episode wasn't quite a strong. Not bad, but not strongly good either.
I wasn't quite as enamored with the Burnham, Spock, and family angle. We've had a big deal searching for Spock. But, no, he's right there in a cave on Vulcan. A big let down for the whole search thing. They should've let Discovery's find Spock through a series of adventures, but that process was short circuited. I also don't completely buy that Amanda was able to single handedly find Spock without anyone else noticing, particularly given the high interest of Starfleet and S31. You bet S31 would have eye's on Spock's family in case they're harboring him!
Spock's family dynamics haven't bothered me up to this point but in this episode it seemed a bit too much. Not a plus for me. And, no, the spouse of an ambassador would have no power to use the spouse's power on their behalf. Not in any rational form of government at least.
The shenanigans on the S31 ship were a little interesting, but mainly a lot of talk about what's going on. The fight between Burnham and Georgiou was added to disguise the focus on telling rather than showing. We were told a whole bunch of stuff in there. Some real and some fake. And then they escaped. A, geez, no, Leland caused the death of Burnham's parents?! I haven't had this problem before, but the universe is getting a bit small for my tastes!
As a huge fan of The Cage, one of my favorite ST stories of all time, I'm very much looking forward to returning to Talos IV. Let's see if those Talosians can fix Spock's mind!