Tolkien himself wrote so much extra material to build the world of Middle Earth with many appendices, the Silmarillion, Poetry books and even history about the fictional world he created that the material is actually ripe for this adaptation, and (again imo) doesn’t feel like wringing something out for extra cash.
They don't have the rights to adapt the Silmarillion. They only have the rights to The Hobbit and The Lord of the Rings. If it ain't in those, they can't legally mention it or adapt it. You better believe lawyers for those who own the rights will be watching this closely.
So it's not actually an adaption of any of all that other Tolkien work. It's taking little bits mentioned, appendices and then making the rest up. Hence why events are different, certain names and events can't be described or mentioned. Essentually loosely inspired by some Tolkien stuff, unable to actually adapt the most relevant Tolkien material.
Which is just unfortunate to be honest. In an ideal world they shouldn't even be making this without the actual ability to adapt Tolkien's writing on this part of Middle Earth's history. They should have just come up with a new story set in the world and no rewriting the history Tolkien wrote.
It's also entirely disconnected and a reboot of the world of the films. Even though they can use their visuals and designs of them
As for my thoughts on the show, I wasn't bored, I was entertained but so little story actually happened. It's not a slow burn, it's just slow. Right now I put this in the category of bad writing where they write a treatment which only requires a handful of episodes. Then drag it out over a longer number. Wasting time with stuff that is kind of irrelevant.
It could have literally just started with a village being attacked by Orcs. Jumped into the story. The characters are so one note, we don't need all this extra time just telling us the same stuff about them.
Spoilers, but a big bulk of the first two episodes was spent with Galadriel wanting to pursue the threat, everyone saying it's over or best not to worry about it. She feels it in her waters. Then at the end there's an Orc. So the threat is there. Why did it need to waste all that time? What did it add? Even the King is like, "yeah she's right, but eh time to let it go." Not efficient story telling.
I will keep watching, I didn't dislike it. I was entertained enough but I am very aware of where it isn't succeeding.
I don't like team sports applied to these things, but House of Dragon is also slow, yet that is more a slow burn as the material happening is more dense and compelling. Each scene building and leading to the next. As opposed to gladriel floating around the ocean and a sea monster for nothing to do with the actual plot. Just stuff happening to drag it out.