Okay, the roof is glitched (Z-fighting) on the two yellow "!".
If you look at the layout, you can see that blue has only 2 exits out of their base, so if red would cover the north doorway of the building in the south-east, and cover the jump off point on the crates in the south, it would be a hard time for the blues to get anywhere.
Now, if I were making this map, and I am NOT, I would add passages to the white circle positions, to make the blues have more options as to their lines of advance. Keep in mind this is just a suggestion, it's your map, and feel free to make it anyway you want.
I really liked that dug out hole in the ground, made me =D when I saw it.