OK, yes, that all sounds good.
Decreasing the accuracy and increasing randomness of damage is certainly the most welcome change. This has been shown to be the way forward in OFP, ever since RED's WEAPONS.
It should be POSSIBLE, yet unlikely, to knock out any armoured vehicle with a single RPG. To improve gameplay, it would be good if the overall durability of ALL armoured vehicles could be raised somewhat. Again, I'm talking about infantry carriers, mainly.
But this is a balancing act. Infantry must also have an effective attack against armour, otherwise it's game over.
Hope that wasn't an entirely trite post!