The squishing of thousands of years into only a few years, the changing of Galadrials characters (who also during this age has a daugher, kind of important since she is Arwens mother), the cutting of important characters to the story (Celeborn/Cirdan the shipwright are who?), the addition of 5 new characters in a story already crammed full of characters, adding a race (harfoots) that wasn't around yet and wouldn't be till the next age.
Might want to update your notes, because that is a lot of things to flub already, and considering how Amazon has handled other adaptations it doesn't inspire confidence.