do you like fog? cause that's how you get fog.
Take away half that material on the cheeks and replace it with fabric mesh. It only needs to provide structure to keep the piece in front of your teeth where it should be. Make it single layer and put a cup of steel mesh over the mouth for even more breathability.
my ongoing solution to the mask issue.. you can see that I've cut my mask down at the cheeks so I can get a cheek weld, but I found the single strap way too tight and it basically crushed my face... I put foam on the inside of the mask to try and make it sit better but it still doesn't fit well.
So you can see the shock cord loop coming out of my cap near my ear. I've sewn in 2 loop velcro patches on the sweatband of the cap and made 2 loops of shock cord with hook side tabs... When I put the other side of the loop on the mask sides, the cord loosely holds the mask up and gives it room to move around while more or less staying in front of my teeth, it doesn't bump in the way of my vision when I shoulder my rifle, and the back strap is loosened to the point that it's more of a guide to prevent the mask from slipping too far in front of my face.
I used this setup at nightfall, and made a set of the loops with patches on it for someone else who had an opscore, he secured his mask to the velcro already on the helmet and it worked well for him as well.
Having the 3 point hang works well because now I can undo one side and vent, take a drink or it's loose enough I can get the tube up under the mask. If I tighten the back strap and secure the left side, the mask will still hang to cover most of my teeth and be completely out of the way for shouldering on the right side.