Well what ya gonna say now Murdr?
I would say it's not the first time his take on something has surprised me, and it won't be the last.
I would also say that it's not uncommon for me to play devils advocate, even if I fundamentally like the idea that I'm poking at. This is not one of those times. You give a no score risk period to a "defender", and it will be taken advantage of to the fullest extent. Playing peek-a-boo with the vulch is a fairly old but actually good tactic, but the sortie does count, and it does affect score via the per_sortie stats. I guarantee you that egg timers will be sitting on computer desks marking the period where the player "loses nothing", with the intent of wasting the attackers time and then ending flight.
No risk period, equals more defenders, equals more fighting opportunities. Sounds good if you are looking for a fight.
However if your Aces High focus is taking bases, this throws a bit of a kink in things. The idea of not porking the base anymore than needed will no longer be palitable if people are free to up like cockroaches and have the option to renige with no consequences if they don't like what they see. Seems to me the two possible answers to that is an SOP of flattening all hangers, and/or bringing a bigger horde.
I like to tag along with base captures, sometimes good fights errupt. If not, I'm satisfied to cap while the toolshedders do their thing. Of couse, if the dynamics change where the game pretty much forces fields to be flattened if you want to achive a capture, I'll no longer have a reason to tag along. Instead of more fighting, there is less.
I don't claim right, but it is a very plausible effect.