Honestly, from looking at the Future Enhancements section on the repo, it's those that are already there, especially audio/video chat rooms - The one feature stopping a lot of people I know from even trying out. That's really the big one.

Out of curiosity - I understand 0xchat does its own thing with private chats, whereas public chats are open to other Nostr clients.

If any, what are the plans regarding the "Private Notes"? Is it something that can be securely accessed by multiple clients, or will it be specific to 0xchat as well?