I love what we get about the First and Second Age from Tolkien's writing. But I'm also happy that Amazon is trying to do a 2nd Age TV Show that is epic in scope, even though they only have the appendices to go off of. Like, I'd much rather that than a Young Aragorn show, as was initially rumored.
Unlike an elf, I'm only gonna live so long. I am happy I get to see an attempt at adapting this Age and its major events. I don't agree that within the limitations and changes they can't deliver something that still gives us some of the power of the implied story (and that's really all we have, a very cool implied story from the outline that Tolkien gave about this Age).
Virtually every "departure" that the show takes, you can see the reasoning of how it fits with different bits and pieces of what Tolkien wrote about Galadriel or Finrod or the First Age or the 2nd Age or proto-Hobbits or Morgoth or Sauron or men of Harad and so on. Yeah, there are other things that he wrote, particularly things the show doesn't have rights to, where then it's like "I'm not sure how well the show fits with this or that, though, and it definitely doesn't jive with this bit over here."
I know for some people as soon as time compression was announced, that's it, it's done, no connection to Tolkien any more. I don't feel quite the same way but that is a valid enough reaction. I hope they can still enjoy the show independently as its own thing, then, which seems to be the sentiment of this thread.