^But they're not completely separate universes. The premise is that the Abramsverse split from the Primeverse in 2233, so anything that was part of the universe before that date should be part of both.
Sure, not everybody likes every part of the Trek franchise. But liking the stories shouldn't matter. Tie-in creators have always drawn on worldbuilding ideas from all over the franchise. Heck, I've based novels on elements from episodes and films I didn't like at all, because the ideas were useful, and because it's all one reality for better or worse. Ideas are ideas.