I'm noticing something really fascinating with how I map for my games.
For Shadowrun, I used a lot of premades with Frag Maps, and made some with Dungeon Draft. I would add walls when needed for Frag Maps, since they were just Big JPGs essentially, and Dungeon Draft could export maps that Foundry could load walls from.
For LANCER I'm using SCMDraft, the Starcraft 1 map editor. I've opened DungeonDraft a couple times with it, but I'm noticing something: I map waaaaaay faster with SCMDraft.
For some reason, I get bogged down in the details with DungeonDraft, but I'm mush happier just painting terrain in the Starcraft editor, and throwing up the buildings from that, and then using the Kenny Game Assets to finish them off in Foundry. Dungeon Draft is my most powerful mapping tool. It has the most options, it has the most like, graphical stuff to make my maps interesting... but maybe that's the problem?
When I get a vision of the map in my head, I can whip it out in 10 minutes in SCMDraft, with the biggest chunk of time coming from like... finding the proper in game asset to use to represent buildings and what have you.