I scanned your post for any periods pinky..and I didn't find one!

lmfao
Anyways...
Bots on one side: I asked this question awhile back myself, and I believe there was a line to force bots to one team.
Axis soldier spawners in bunkers: No problem, just move the soldier spawns where you'd like them to be...you would just have to edit SoldierSpawns.con. Use 'console.showstats 1' to find positions in-game by walking around.
You could just rem out the axis top base flag, i think.
I might have some code that added MGs (4 total) to each bunker window. You could do something like that, maybe. If client-side, maybe remove the overheat? There may be some sort of AI settings to get the bots to lay on the trigger but i don't know much about that stuff...if that doesn't work, you could make *some* of them fire dummy projectiles.
Explosions...can you spawn projectiles in DC? If so there u go..if its like vanilla, then no. For SS, you could drop a small object from the sky, they'd explode on impact..lol. Client-side, I'm not sure, there's a few ways to do it.
Just look at the bot settings, look at other vehicles for examples...maybe some of the AI guys here could help, I hear the battlefield singleplayer forums have good AI coders.