Alright thats a bummer i liked that control-nodes had more to them than just being control-nodes.
Regarding your turret-build-system i sense a really ugly problem incoming.
You see in catalyst1.0 it was already annoying when 2-3 turret-carriers planted their turrets in one spot basically rendering this spot inpenetrable for the enemy. Now whith the new system there is no limit to how many turrets you can deploy after purchasing the turret-node -> hope you see the problem right there. So if you want to keep this as is turrets should cost minerals and/or vespene otherwise 1 player can render a whole area of the map inpenetrable resulting in unnecessary drawn out games or stalemates. A limit per turret node would not solve the problem cause you could just build 20 more turret-nodes in the hangar.