Thanks for trying it out! I believe I can make this. :)
But just clarify something for me: The reason you want this feature, is that will be a lot of work for you to set up the terrain tags in all your tilesets, right?
Yes! That's right, if we have over 60 tilesets, it can end being over 1000 clicks to be placed. So that is a quickest way to generate a map in two colors, and if we want to show an specific color for specific tiles like for example blue color for water, we only need define the water terrain tag on the water tiles. This is such a incredible Quality of Life upgrade for everyone :D
Of course, such new feature should be optional (parameter = true/false) since I believe there are already many people with the plugin that already placed many terrain tags.
Thank you very much for the answer :D will be waiting for this upgrade ;)