bombs should be releasable within the stated limits for the airframe, if the real aircraft could do it, the AH one should too. I dont remember anyone posting that heavies should be allowed to dive bomb.
another thing to mention is that lancstukaing gvs really isnt very effective, plenty of times I see people making a couple of passes salvo 5, getting 1 or 2 kills then landing and wonder why they bother. A20 is way more effective - potentially 8 tank kills with bombs plus a bunch of m3, jeep, m8, wirble kills with the .50 cals. 15 is my best so far without a rearm. even a heavy spit XVI will net you more kills than the average lancstuka sortie, and alot quicker too...