I hope you're supporting the VTT format rather than introducing yet another "standard" format.

If the VTT format is lacking, then please work to get that format extended so we have a better format rather than fragmenting yet another format.

As someone who owns a few different dungeon drafting tools, it's a real pain when different formats don't work well together. Lighting seems to be the biggest issue where drafting in one editor and importing in another will lose lighting settings.

I'm working on print outs only, as I don't use digital maps.