I'm really curious to see the overall reaction on this one. I think it can be quite dividing.
Personally I really enjoyed it. A few slow scenes here and there, some rough editing sometimes, a few over the top moments, but overall nothing too dramatic and the general storyline, the emotions the episode wanted to convey was more or less on point.
Beautiful cinematography though, and really liked those new aliens and the twist on them ! I would be really curious to explore more of their culture so kuddos to the writer for that !
But I could understand why some will find it over the top at some point !
And I really wish we had a scene where the Tardis team explains who they are to Umbreen and asking her to keep it secret all these years, and then, at the end, we could have had a powerful scene where Yaz and her nanny finally share a strong moment... but it wasnt, and now we have to assume Umbreen just didnt recognize the similarity between her granddaughter and the strange woman at her wedding...
Though speaking of strange women, I wonder if she'd remember the Doctor...