I'd rather see more fine tuning, bug fixes, UI improvement, etc rather than anything new. For example, tagging people still causes the app to crash for me (latest version). Typing has a bug that causes spaces between words to delete. New features are great, but existing ones should work perfectly first in my opinion.

I also hate auto draft and would like to disable it. A Save Draft button would be better for me. Nothing I type should be saved, sent or read until I deliberately decide so. Currently, it feels invasive. I shouldn't have to request deletion for something I didn't even want saved.