It looks so good to play without the hud for a while, but the loss of the hotkeys (number bar 1-0) is a dealbreaker. If you'd need the hotbar to remain visible, that would be totally fine.
Another wish would be to have the hud auto hide after a timer, for example five seconds after last use. Possible a ups drain, but idk?
When fighting biters and doing a turret creep, it's really hard when the hotbar disappears.