The problem with getting someone onboard is the lack of tools. This is a custom engine and I have no user-friendly tools. After the release, I might put some time into making proper tools, so the next game (or addons) might be done in a bit larger team than just me. Another reason is that the game is quite experimental in many ways and some of the stuff changes a lot (internally). It's like inventing/discovering things, what can be done and how. If I get more experience with that, it will be easier to build the right tools for the job.
Besides downgrade in graphics (simpler reflections, lightning, a bit less detailed models) there's only one difference - closer view distance on Quest when outside. It doesn't affect gameplay. Well, unless you play with navigator modification turned on and you want to use further objects to place yourself on the map. But even then, the view distance is enough. Quest 2 is between Quest and PC version.