While I understand where you're coming from, I honestly don't think the default maps are quiet at all. Fluorite, Bonfire, Ficho, Ascenion Island, South Pole, and really all of them are fairly popular (even Last Cave has a decent amount of users at times). It could just be the time zone that you're in that makes the default maps seem quiet, though, Blue, but I don't know if they truly need much of a revival.
However, everyone has been asking for new maps. This idea and many variants of it have been posted many times in the past, but the problem is, without the source codes from the original game (which the creator, KovuLKD, left us and took them with him) we cannot add any new, official default maps at our current time.
A thoughtful point, though. c: