The Sauron reveal made me go... "waaaaiiit..is..whatdafuq? Oh no!", I was tricked because I expected the Dark Lord to be hanging out in Eregion disguised as an elf to get ready to do his Annatar thing with Celebrimbor. But, since Amazon does not have access to Unfinished Tales, I forgot they can't really use Annatar. It made sense to me that Gil-Galad would be alarmed by Celebrimbors attitude and the things he said, he knows what trouble Feanor's (Celebrimbors grandfather) work caused. And the scene where (redacted) figures out who (redacted) is, was great as was their reactions in the confrontation and trying to stab Sauron. Not that it would work, Sauron's a Maia, as is the Stranger. I knew what the gems were going to end up in the moment I saw them, red, blue, white/clear. Narya, Nenya, Vilya...the Three. Vilya goes to Gil-Galad...for now, Narya goes to Cirdan (who we haven't seen yet)...for now, and Nenya goes to Galadriel.
The reveal of the Stranger as an Istari did not take me by surprise. Since there are only 5 of them, and two of them are in Unfinished tales and thusly their names can't be used, that leaves Gandalf, Saruman and Radegast. Considering the things he said in the final episode and the fact that he's hanging with Hobbits, I'm going to bet he's the future Gandalf. He "could" be nature loving Radegast, but is unlikely to be Saruman who like Sauron was a Maia of Aule and had little interest in growing things and the small things of the world.
It was interesting and a bit strange to hear the famous poem about the rings put into song at the end...sung by Fiona Apple no less.