It's probably just me but I don't like how those gas expos (not the nats) are tankable from the player's main.

see those expos as a expos belonging at the main more near to them, for example the expo in the 5h is an exp of purple player not for teal player.

other comment/suggestion?

toss will spend too much trying to expo against zerg, nats are too open. z>p

i can restrict with some mineral wall

Some chokes are just too far from main. top left especially.