That sure looked pretty, and I hope that this turns out to be good!
So I haven't read Silmarillion, and I'm not the most knowledgeable about this. But I've seen some backlash about two major plot points happening at the same time in the show, while in the Silmarillion there is like a 1000 years between these two plot points.
Honestly, some parts of the Silmarillion are so incomprehensible for a regular person, that there has to be some changes to make it an entertaining TV show.
But in the end, I just want this to be good...