Cool paintovers guys! thanks so much, very helpful.
So yeah, those thumbnails I did, with the color etc, were just to give myself a rough road map. So now that I have my map in place, and general ideas ready to go, I am indeed slowing down, and taking my time and firepower to one area at a time. I'll post an update soon, but I've essentially done what you two did in your paintovers already - sat down, did the general perspective lines cleanly, locked in some of the more major line work, and started rendering the floors with some cleaner contrast and a dark feel - the color is really helping there.
I'm excited to get everything drawn and clean now, especially after so many rough drafts! The help and advice I've been getting in this forum have been really great, I really appreciate it! I'll post an update soon!