There aren't enough PoI's in Navezgane of each type to hold my interest. In RWG, you find a city and it will probably have at least a few types of Signed stores, possibly 2 of one type, and maybe a school or 2 with a library. Navezgane has few of those, in a much smaller area that's easy to memorize, and in MP that means somebody who knows the map can run around and loot all of the good PoI's, leaving nothing of value for people who join later or don't know the map. I would also be much more interested in Navezgane if it becomes Story/Campaign mode, with RWG more focused on being MP. A story seems like it would be easier to implement on a pre-planned map.
So if "Polishing and refining" means adding enough to make the map interesting for a longer game, or MP, then that would be good. But I would much rather see things like the canyon be added to RWG. Even if there is no Gimmie entrance like the mine shaft, it's not real hard to make a staircase down into the bottom. Putting interesting caverns back in, along with the planned Dungeon PoI's would be great. Underground is intense with the darkness and fear of cave-ins and such, meaning it's great fun that can give a real sense of fear when you're building a suspension bridge from the ceiling and you know one wrong move is a fall to near-certain-death. And if ferals and bears spawned in caverns as I read so long ago, that would make them the whole F*cking game.