I have a similar "user profile" and find typst a much better experience. It's true CeTZ is not as mature, but it's much easier to extend where it's missing functionality (because you have a nice, normal scripting language to work with instead of a macro mess). But math is the reason I smile every morning when I open my .typ files. It's so clean and readable, and a pleasure to write, compared to LaTeX. It's also not as mature so I can imagine some things can be tricky to do in typst depending on your needs. But it does everything I need, and is only getting better (I see that several of the annoyances I found are getting fixed in the next release).

Can't comment on the AucTeX part, I'm using helix and typst support is not great but good enough.