sentinel

I don't think anyone wants to take an exposed third base that has less minerals and will also allow for two entrances into their natural. It's a bunch of cons and no pros.
Liberators will be quite difficult to deal with at the natural, especially around here. Or tanks. https://i.imgur.com/qKvYjn7.png
Beyond this, the map seems like a large standard map, and a bit too large. 160 maps usually have too long of a rush distance for armies to cross, try to stay below 156^2 bounds on a 2 player map, most make theirs around 140-148.
The natural mineral line seems unnecessarily complicated and inefficient as well.
Despite being so large, this map doesn't have much going on feature wise with all the paths everywhere, with bases just being put places to fill the map up rather than serve purpose.