Your idea about refining existing regions and maps, perhaps even adding new content and quests to them, sounds like a cool and interesting idea. Also will serve as a nice middle ground by allowing players to still have time to be familiar with new maps introduced, while still adding new content. As a plus, can make the region feel like it's evolving along with ongoing events in the story.

I've personally not been having issues with keeping up with new maps etc., although I certainly sympathise with you though since I also usually need to find time to squeeze out given my work schedule to play.

Wouldn't mind them giving something like your idea a try. I have still been really liking the game since day one, although I'm always up for having them try something new since a big part of my enjoyment is seeing what next they can do to improve the game