Currently no, but sure it would be possible to implement a "half up" status, which then could be bombed to smithereens again.
But I doubt we will ever see such a thing, because it would be quite a big impact on game balance. It would make it much easier to shut down bases indefinitely. On a horded base the VH would probably not be up until the base is captured, no matter how long it takes.
On the flip side of things, I'd like to see a "slider" effect on the rest of the strategic OBJ and maybe even hangers similar to that of the fuel. This "all or none" thing gets a bit over the top sometimes. For instance, with fuel depots once the 4th one is destroyed the max fuel available is %75, at the 3rd FD destroyed no DT are available. I'd like to see the 100lb/50kg, or maybe even 250lb/100kg bombs be always available. Maybe even as en experiment. With the first ord bunker being knocked out, the 1k+ bombs are diabled, the 2nd ord bunker down = no ords 500lbs and up. The rockets would all fall into the #2 ord bunker.
Likewise, have the barracks be stepped as well. But, that would change the dynamics of how many troops each vehicle can carry. Maybe allow the goon to carry 16 or 10? The M3 twelve (its proper troop load out, iirc)? Keep the SdKfz 251 and LVT2 at 10 and the jeep at 3. Upon the 3rd barracks being destroyed, only loads of 10 or fewer can be taken, upon the 4th only loads of 3 (have 3 be an option in all gv's), and upon the 5th have troops be shut down.
With the VH destroyed, why not allow a select few gv's to *always* be able to up (m8, M3, SdKfz 251, jeep, M16) ? Make it so bases are not quite %100 shut down? Just a couple of ideas.