Yup that’s it, it really is only for aesthetic purposes.
Here is my simple example. I have a “grass plains” tile, which has a small rock that randomly is shown as “visible” (again, just to break up the landscape a bit, visually). To further improve the aesthetics, you can see the tiles are rotated in multiples of 60 degrees. Because I’m too lazy to always do this manually, I added it to the constructor. I even went further actually, and made some utility scripts to auto-populate the grid with a base tile (as opposed to the static mesh). Just simple useful things, for lazy people like me 
I understand though that you want to keep it clean and tidy, and that is of course just fine 
I’m having alot of fun with your toolset though 
