Liking the concept. A few semi-random thoughts/questions, mostly on airborne units/formations.
How does VTOL and fighter formations figure into this for movement? They can cover a lot more ground than ground or mixed ground/VTOL formations.
Will fighter formations run CAP/BARCAP, to limit the ability of enemy airborne formations to reinforce? For example, deploy a fighter formation to a strategic hex as BARCAP, where they intercept any fighter or VTOL formations that try to move through that/adjacent hexes.
What about airfields (small, medium, large, DropPort) as a 'facility type' to attack/defend? Requirement/bonus for staging airborne formations from airfield/DropPort locations?