While I enjoy the craft side of wargaming (building models, painting, etc) and am unlikely to set aside miniatures, I admire what you’re doing! It makes a lot of sense to me to develop rules and the game boards and markers that allow you to get a lot out of the hobby. I’ll be interested to see updates.
I realize that you went with small boards to fit with gaming on a coffee table, but it occurs to me that your rules might be able to work on bigger boards if you have more space in the future, and handle larger battles in an efficient way. Not saying you should be playing battles on a larger area, just that the approach you’re using seems like it would scale up well if you ever decided to go that direction.