Not to sound like a jerk, but: Yes, great. Now what? Will you make one?
The community here is so small that among us there aren't a whole lot of software developers who can take on such a massive project, especially since a few that might have left to do WftO.
Now there are some people developing KeeperFX in their spare time, are you saying they should stop work on KeeperFX and spend time on this editor instead?
Keep in mind that if rewriting KeeperFX is complete new features could more easily be added, high resolution sprites can be introduced, current limitations(like the number of IF-statements in a map or total number of creatures in a game) can be addressed and fundamental problems like the pathfinding bug can be solved. All this can and should enable map-makers to do stuff in maps that are currently impossible.
If there was a new editor (or simply a GUI written on top of Adikted), this would only make mapmaking easier/faster at best, and would not lead to additional possibilities. It is hard to who is still working on maps - hardly any are still released - but my guess is that most of the people who are can either work with Adikted easily enough, or want to make maps that can be done with the official editor no problem. Those people would rather get some new features to work with rather than a better editor.
Besides, I think the actual time spent in the editor is just a small part of the time spent on making a map. Designing, scripting, playtesting, balancing it all out, fixing it, fighting against the game limitations all take a lot more time. Unless a map is simply drawn and hardly scripted, in which case there are quite a bit of those maps already. I would prefer quality over quantity, but at the moment nobody has any suggestions for some really great maps.