One thing I'd like to see improved is the mobile experience. I completely understand that features like the 3D editor and rendering might not be practical on a phone, and that's fine.
However, it would be really useful to at least be able to access ongoing projects, check their progress, and send new prompts from your phone. I mostly work on my desktop PC, so if I'm at work or the gym, I often have to wait until I get home late in the evening just to check the status of a project or provide further instructions.
Being able to do those things on the go would make a big difference, especially when working on projects that take some time to complete.