Don't like the idea. Development resources are limited, and spending it on a revamp of existing code for repairs instead of updating FM's, damage models, and addition of new content (like planes) would make less sense to me.
Although we get a rearm of 30 seconds, doing damage repair is far more extensive than rearming a plane. Even minor damage must be investigated for any additional damage that is not readily apparent in an aircraft.
IRL: Sure, patching holes in the exterior and control surfaces can be dealt with quickly, but what unseen damages could there be to the control runs, fluid lines, frame structure, fuel cells, and so forth that would not be apparent until the plane had it's panels opened up and inspections done? Not a quick thing. Planes coming back with damage would typically spend all night in the hangars being gone over by ground crews to be readied by the following day, or they would be deemed too far gone and salvaged for parts.
In game: seems just a way to either try to run up scores and kill numbers even more for the name in lights thing by some, or a means to get around when FH's are dropped at a field at which point it then becomes a game balance issue.
In any case. I don't see the need and too marginal for expenditure of development resources.