1) Continue as before (i.e. create semi-modular maps that can be pieced together in a certain way to create another mega-dungeon level).
2) Concentrate on building up a library of 'mine geomorphs' (like the 'bonus' maps I made during the period when my first milestone was temporarily met).
3) Abandon the project altogether.
4) Something else entirely?
Note that I'll probably be posting a similar question over on the social media sites, but I thought I'd ask the opinion of you guys first (also note that I'm kinda leaning towards option 2 at the moment).