Double posting for an update! The main overworld is nearly done with only a handful of screens to go, and at that point focus will turn to Death Canyon and Kakariko Village, and eventually the third Pendant dungeon.
https://dl.dropboxus...ZC/zelda111.png <--- overworld progress
I've also been working on a fairly simple scripted harmful darkness mechanic like in Metroid Prime 2. Wasn't too difficult to set up with a script dmap flag and an FFC that temporarily negates it.
That map looks really awesome! I can see that it kinda looks like Q744's overworld but at the same time it doesn't. Gotta love that "No" on the top-right corner though