I'm split on this episode. While I enjoyed the broader storytelling of the three threads of this episode, I quickly got tired of the melodramatic slow-motion sequencing that occurred during the Númenór and Orc enslavement of Elves stories. Reminded me far too much of Zack Snyder and that's never a good thing.
I also wasn't a big fan of the level of snobbery seen with both the Númenóreans and the Harfoots. While I get there 's obviously a painful history between the Númenóreans and Elves, you'd think if they didn't like Galadriel so much they just give her a small boat as quickly as possible and be done with it instead of all of the handwringing over whatever. As for the Harfoots, it was weird that their nomad ways developed such a faith that easily accepted the idea of leaving people behind when there were clearly plenty of able bodies who could help those in need with pulling carts.
As for the stories themselves, we finally meet Númenór in all of its beauty and splendor before its destined corruption and decay. Along with the kingdom are some familiar character such as Elendil, Isildur, and Pharazôn, while name-checking Elros (who apparently is still alive, which is weird...). Galadriel figured out the nature of the symbol she discovered far sooner than I expected but I'm not surprised that it turned out to be a mini-map of Mordor itself. Question now is how long will she be stuck on Númenór before she's able to do anything with this knowledge.
I'm relieved that Halbrand doesn't appear to be Sauron after all (unless it's part of a longer con) and instead is some lost destined king in rags (sounds familiar), although since the character was created for the show, anything is possible. Since my detailed knowledge of The Silmarillion and the like is limited, I don't know if the idea of a king who united the Southlands in the past with the possibility of that happening again is a creation of the show or not.
Likewise, The Stranger also doesn't appear to be Sauron as his more kindly nature has emerged and it feels like any anger he had before was more born out of frustration and confusion than malevolence. I'm still going with my wild theory that he's Beorn instead of possibly Alatar or Pallando, even if ithe latter seems more likely.