WetGeek Tomorrow, I think I'll polish the installation a bit
Yup, did that. I'm logged in to an X11 session, so I can run the Xfce VM at full-screen, and it is now configured to match my daily laptop. I still can't really get comfortable with the bottom panel at the top of the screen, but I'm less concerned about the dock, after seeing it in action.
If an application is taken to full-screen, it's allowed to cover up the dock, but just a couple of pixels worth of the dock is always visible, so a user can click there with the mouse and the dock appears fully. So, very little of the dock is actually covered up, even with applications at full-screen, and yet the dock is reachable at all times.
So, today I've been at it since very early this morning. That upper panel is the only thing that keeps reminding me I'm using a VM. Obviously, I have't tried every app in the menu, but so far everything I'd needed has been there, and it's worked fine. I'm now going to concentrate on DE-related stuff (utilities, etc.) because, after all, the difference between Solus editions is the DE they use. I hope to give this one a workout.