And a small nitpick, but it's a little hard to see the cliffs here.
I feel like knowing where cliffs start and end is sort of essential since breaking through high ground is of the most dangerous things you can do.
The trees and rocks obscure the view.
If you don't provide alternative entries to a base placed on HG, you should place rock tiles around the cliff ramps so you don't get an impenetrateable HG situation.
Otherwise people just build air only.