Bustr,
I agree that this is not a perfect mechanism, however tinkering with it could produce grave results. Maybe you haven't noticed what it was a fix for, because it rolled out at the same time as other strategic rules changed.
I believe that downtime (dt) commands go hand and hand with the resupply town rules (a whole other thread). Take it away and base capture effort will be even less than it is now, halting most of the fluid game play that used to be present before the heavy handed hordes became necessary.
As for the hordes, they moved so swiftly, they didn't need hangars down and hardly if ever, needed them down twice.
I do not think it was an oversight, it was a necessity, otherwise most would not bother to invest in strategic system game play at all. It also, does more to guide the action than dar bar does (for those that use it properly).
Without going into any depth on the matter, it should stay as long as one field supply delivered can foil an organized team effort, instantly.