Not much to chew on here but the fact that he is optimistic is a good sign for me (I will take any hope I can get).
I will say that everyone I’ve interacted with in the — I’ll call it the new Paramount — understands what Star Trek is in the sense that they don’t want to mess it up. They understand how important it is. This isn’t just a cash cow to them. This isn’t something where they just need to put laser guns and a spaceship together and get it out there. They understand that this is something special, and so they’re working very hard to make sure that what they do next lives up to that.
I was mod of /r/StarTrek for a decade and I have yet to see a single situation where a vague “bad writing” complaint wasn’t serving as cover for a (let’s just say) less socially acceptable criticism.
If you’re being honest about your feelings then my advice to you is be significantly more concrete with exactly what it is you are criticizing about Kurtzman, or people are going to assume you’re obfuscating your true feelings.