I recently picked up a bundle offering of your tilesets and really love the content! One thing I have recently begun working on; is attempting to integrate your tiles into Godot's tile system specifically with the "Auto-tiling" feature documented here.
There are lots of different templates to follow but; I gotta say a total dream would be if these packs had artwork arranged like the following:
If we were considering a dirt-road with grassy borders around it, the red would be the dirt path. It makes for a lot more tiles to create, but the end result is really lovely - it allows designers to simply paint and the engine will automatically arrange the appropriate tiles.
I'm working now to try and modify the packs to get this behavior working with more terrain stuff, an "autotiles" pack would be so awesome!