Well...as said, I can't actually give a fully real take as I've not actually watched the show and basically refuse to. But, I can speak on what I do know and form a take around my knowledge of Tolkien proper, and I haven't felt any need to post any of those opinions... til now, and only on one specific. Sauron is a very different beast from the likes of other iconic villains. In many ways, he's defined by not being identifiable. There isn't an iota of sympathy the audience should have for him. His being relatively mysterious, even downright incorporeal in LOTR itself, is a reflection of what he represents. He is the other. He doesn't merely utilize deception and cruelty, he literally is that. It's the idea that his being is ever present and yet always unseen. Even when he does appear, it's almost always (if not entirely) a disguised manipulation. Sauron is less a character and more a preversion of the forces of nature. He's very theological in his conception and really is an archetypal embodiment of evil itself. It's not about his details; I don't even want to know many of them (and Tolkien doesn't deliver many for an explicit purpose); it's about what he represents. That is bigger than any background you can give him. He's a less is more character. The less you see, the more fearsome and seemingly unstoppable he is. He is within the image of an omnipotent figure, beyond out true understanding. You're not supposed to see things through his eyes, but rather witness the horrid wake he leaves through his pawns and machinations. He's basically a surrogate for Lucifer himself. He is intangible, meant to feel untouchable, reflecting the notion of a very innate base emotion beyond our comprehension.
Even Jackson himself knew this, originally having Sauron himself come out and confront Aragorn at the Black Gates of Mordor in the climactic battle at the end of ROTK. They were to have a big sword banging muck about until Jackson realized that this not only betrays the "character" of Sauron, but thematically undermines Tolkien himself. He insisted upon changing it, and subsequently, the big Olog Hai troll that Aragorn fights was superimposed over what was actually originally Sauron. It wasn't about some cliched one-on-one superficial dual for the fate of Middle-Earth. Sauron is beyond that. He works as an antagonist despite never even physically appearing in LOTR because it's really about what evil, exostentially, even is or means!
What this show has said, implied, and now done with Sauron is, by far, the worst thing to have ever been done to what ultimately boils down to Tolkien's literature epic. It's a fundamental misunderstanding and misrepresentation of the base themes of Middle-Earth stories in and of themselves. The show has made more than enough questionable decisions as is, but this? Making Sauron a heartbroken, bitter jerk who wants Xena Galadriel to be his queen? This goes beyond bad and into downright disrespectful fan fiction territory.
What's that sound? That's the sound of Tolkien rolling over in his grave. If you thought he'd have hated some aspects of the Jackson adaptations, dear lord...I can only imagine what he'd say about this. Thanks, Tolkien estate, for selling your soul to Mordor...I mean Amazon! The estate disliked the Jackson films, stating they felt too Hollywood action in nature, yet they delivered the keys to the bus to writers who turned amongst the wisest, most spiritual, and most nuanced roles in Tolkien into Xena Warrior Karen. I eagerly await what they have to say about the show now that it's through season one. If they hated Jackson, oh boy...
I'm pretty damn shocked that that pretty cringe comment on sexy "I can save him" romance Sauron from that immensely cringe video panel of "Tolkien fans" that Amazon posted on Youtube (and subsequently remoted due to the amount of dislikes) came true!
Again, hey, if you like it...more power to you. Don't let my words ruin your fun, they're just the ramblings of an over-protective Tolkien fanatic. But I have to be sincere here in saying it's immensely hard for me to believe that anyone who deeply appreciates Tolkien's actual work can sincerely find this enjoyable. Hey, I'm sure it's possible, but it's just difficult for me to fathom that. I can't understand that. Perhaps from a casual fan or someone who's altogether unfamiliar with the world, but otherwise...I just can't see how this is pleasing to Tolkien fans. Not gatekeeping here, enjoy what you enjoy, just stating I legitimately don't understand how. Adaptation is one thing. Edits, alterations, and so on will be inevitable when adapting novel to screen, particularly Tolkien. I can roll with that. I am understanding of the difference in mediums that requires cuts and changes. Film flows very differently from page, page grants far less time restraint, etc. Jackson changed plenty, but I do find the underlined important beats were preserved and the spirit was respectful. This isn't that. This is a fundemental bastardization of established lore that undermines the very themes and purpose of the tales themselves.