Felt like it probably worked a bit less like a time travel mystery, but worked very well as a La'an character piece. She got to experience what it was like to live without the burden of her heritage, but realised that for the greater good, the bad things had to happen.
The plot contrivances were a bit on the nose, the convenience with which they located people and facilities in particular, but again, it didn't bother me one bit. The emotional scene of La'an in her quarters, at the end, after her call with Kirk... great stuff!
I expected a Guinan-esque moment where she would hand the watch back to Pelia and they would just smirk and nod. I felt like Pelia was given her "the look" when she returned to the bridge at the end, so that may have been it. But then the "cliffhanger ending" where the camera focused on the watch? Who knows, Boimler may need to come back and fix this mess!
But also... no matter which timeline we're in: Where did Chief Kyle go??? Was he too mean?