IMO the movement changes and pre-measure is what made so many rage quitters of 8th. The movement restrictions in KOW mean you have to be spot on with your deployment and have a overall game plan before you start. If you can force you opponent to change their strategy your half way there.
When you use no pre-measure just some Gentalmen rules before you roll a dice:
1. If you delare your going to shot at a target and its out of range the shot is wasted.
2. If you fail a charge you have to move your full Advance move making any direction adjustments. (Yes this could mean your left with your ass hanging out but serves you right!)
3. Agree with you before you roll the dice where you take measurement from: I play centre of the model.
That's about it. If you have been playing for a while it doesn't change much to the game because you know most of it. But there will come a time when you miss by a hairs dick.... then you have my permission to curse my name.