I'm largely enjoying it, since I'm a huge SC lore lover, so it's kind of hard for me not to like it. But I've definitely got a list of things that have been screwed up: such as taking things from books due to lack of creativity and not using them accurately/correctly anyway. i.e.
Preservers - supposed to be so rare that Artanis himself could not for the life of him find any, and Zamara said she was supposed to be one of the last preservers (and she's pretty accurate....bearing the memory of all khalai protoss and all). A year later Zeratul knows where 3 of them are - and they're Khalai too - so it makes zero sense. Nothing in that mission depended on those Protoss being called "preservers" either. They could have just been called "mystics" or anything else.
Palette Swaps & Voice Acting - Don't mind many of the palette swaps to tell you the truth, but Mohandar just irks me. In DT Saga Twilight this mofo was so frickin old that you could see every wrinkle in his body. Mohandar in the game though is just another smooth-faced Void Ray, and neither looks nor sounds old. But again, Blizzard has no creativity and needs to put in characters from books regardless of if they're relevant, and to hell with any previous descriptions of these characters. If you're not going to make him an accurate portrait/voice, then don't include him in the game! They could have just as well gotten another random Protoss, considering it was a vision of a hypothetical Armageddon.