I get the impression that many of those who like the current direction of the books are those who didn't like the TV series and didn't like Janeway either.
As for books being canon or not, for a very long time I stated in several debates that I regarded the books as canon.
And look what I got for that!
Nothing in the books is canon until mentioned on screen. If Prime Spock drops some tidbit in a future movie or series about the prime timeline that confirms something in a relaunch book than that's canon but otherwise, it's all just stories. And yes I know Nimoy isn't going to be in anything else but someone in the JJ verse may quote something Prime Spock wrote some day that gives us something canonical about the prime universe that takes place post what we have seen on the screen so far.