To name some off the top of my head. Things I would prefer not to see in the next Trek series or at least see very little of.
1) No Time Travel-At Least Not To Earth
2) No Holographic characters...and no holodeck. Sure you can still have the holodeck and even refer to it in the script. But never actually show it or feature scenes on it. It has become too much of a writers crutch in modern Trek.
3) No androids or robots. And no artificial intelligences either.
4) No aliens of the week. Specifically, don't introduce a new alien race planning to use them for only one episode. I would tell any Trek writer that if they wanted to introduce a new alien race that they had better have at least TWO MORE possible stories for them to appear in the future.
5) No god like aliens.
6) No episodes for laughs. Humor within a story is fine. Just don't deliberately make lighthearted "laughers". Like DS9 featuring Quark wearing a dress.
7) No reset buttons. What happens in the episodes happens in the episodes.
I was hoping to run this list out to ten but that is all I've got now.
So basically everything that has ever been shown on Star Trek. So you just want to see a ship flying around in space for 30minutes. Sounds fun.