I just had an idea on a way to fix the broken part of the Damage chart. When you roll to penetrate a vehicle, for ever 1 you go over the armor value of the vehicle, you should get a +1 on the damage chart. This would make so much sense that its probably never going to happen but it would be awesome if they did. Think about it, a Railgun fires at a Rhino. He rolls a 5 to penetrate. So since he's 4 over its armor value, its automatically destroyed because everything from immobilized down is now off the chart.
Just my 2 cents