OK, I was a bit fried when I last responded on this thread, so I can now tell you my thoughts on this.
Theres one bug that I have found... and that's the gunner's sight. It doesn't bother me because I tend to play as the Commander. I'll try to fix the config file, as I don't think we'll get any support from the designer, he or she doesn't even speak English.
I'm not sure what you mean about the NSVT, CrunchyFrog...
The actual 2S19 is equipped with the NSVT. Or did you mean that the model doesn't have the NSVT MG on the outside?
It doesnt really make a difference because BIS in their infinite wisdom chose to allow only one firing point on a vehicle- regardless of where the model of the MG is pointing, the gunfire will appear to be coming from the same point that the cannon fires from. It doesn't really bother me either.
"Missles from nowhere..." Well, same deal. The Krasnopol missiles that are fired from the cannon's breech on the real 2S19, would appear to come from the main gun's muzzle. Because in real life, they do.
Captain Caffeine, the "tubes" that protrude from the turret, above the cannon are shock absorbers, to help reduce the cannon's recoil.