Yes Fred this is something I have considered.
Going a stage further, I have thought about making the base Melee/shooting saves for all raw units 8+, standard 7+ and veteran 6+ in all circumstances, with modifiers to reflect armour/shields. Thus veteran Roman legionaries would be well armoured, with a +1 modifier on the card they draw.
The drawback of this is that the player of an armoured unit might have to remember to apply a modifier to its save, which is hard to explain to new players. But it would help with the rallies of the best-armoured units such as Knights.