I think the changes this edition are bringing are good, but I think there could have been a few adjustments to the pros/cons of the unbound/BH style armies. Not sure what, but in general I think what were going to see in games where the two armies meet: Unbound armies will try and wipeout their opponent, their opponent will try and score as many points as possible, while attempting to survive to the end of the game.
I think the slight perk to armour was good but I was personally hoping for something more robust, but I admit that might be too big a game-mechanics-changer. in deference to the rekindling of the old edition's style I wouldnt mind some sort of more complex vehicle damage chart. Heaven forbid GW were to implement something more complex than a d6 or d6+d6 system.
just as an excersize in thought. vehicle damage table on a d10:
1-2: Shaken
3 Stunned
4: Engine Damaged (1/2 Movment/looses jink)
5-6: Weapon Destroyed
7: Immobilised
8: Loses three Hull Points
9-10: Explodes
I want to reinforce how I think this will NEVER HAPPEN