This is a good base, but I'd like to make some suggestions.
1. Put local and workshop assets in separate tabs from each other to avoid confusion.
2. Make it easier to write code for or interact with the Q menu's UI through entities. Right now the UI is super limited and I feel like allowing entities to have their own UI would make things much easier
3. Allow packages for having multiple entities instead of being published separately (if there's already a way to do this or the one before I'd love to know)
4. Although hotloading is great, I feel it would be better to have some kind of favorites system that load entities or models on launch rather than during gameplay. Maybe a kind of mix of how this mode works currently and Gmod, since both approaches have advantages and disadvantages.
I'm not sure how feasible my suggestions are, but streamlining the user experience and the dev experience would definitely help this mode shine more. I know you're already working hard on optimizations but I'd like to see improvements with addons as well
GraphicsMultiplayerControlsUnfinishedUnoptimizedConfusing