Should the light ground transport's HMG have alternative options?

The MBT and IFV remote weapons both have 3 separate emplacements to choose but the remote weapon on light ground transport lacks alternative options from the hmg. Being able to choose a the lmg or grenade launcher emplacement would make the vehicle a little more interesting, I can't imagine it becoming over-tuned as the vehicle and occupants are vulnerable to gunfire and landmines notably more than other vehicles. 

The available remote weapons for MBT and also IFV

I 

only hmg available