1 - For all vehicles, when you driving - you don't actually feeling weight, also - too short "length" beside wheels and keyboard (or time beside key press and power to wheels), check photo below.
2 - There is two versions of cannon for turret, and AFV-4 has turret with 3km shooting distance.
3 - One MP-T shell for Bushmaster cannon mod.44 can make a hole in almost any wall with 0.2 m diameter and kill anything behind the wall in visual space box 1x3x1 m.
4 - It can help in the future, as I know, probably in next year Arma3 get the cargo plane, and so, if it could transport vehicles with that weight, Retractable Turret could help with loading AFV-4 in the cargo space of that aircraft. Also players could drive it in the White hangar (with enters on two sides, it's important mostly for CTI game mod).
7 - If some other changes with that faction will happen (not bad textures, but like - not serious, vehicles looks like toys)
9 - In real, you can set the moment of detonation for MP-T shells.
May be, some suggestions would be correct for other fighting vehicles.
Thanks for reading