If you know frostbie, then in good old days in RTCW there was no allied command post - it was just a flag which was easy to capture by allies to have spawnpoint there but also easy to re-capture by every axis player. The current CP is hard for allied to get but even harder to lose. If allies have main bunker and also cp built, I dont see axis really claiming CP back as it takes so long and hard route (its possible to spawn as covert, blow up CP near your spawntime, spawn at cp as engi and re-build it, but its damn hard).
I would ask - why isnt the battery door rebuildable for axis? Ive seen also battery version where you can have stairwell from beach to gun directly.. those are all lovely versions but makes that map very unbalanced in a way.
I guess the real other option is to have regular version. It takes away axis spawn from cp that isnt built but also takes away possibility to blow backdoor with dyna and main bunker door with dyna.