Thanks. All the credit goes to Relic RTS games Company of Heroes series and DoW2 though
I liked it because it keeps the encounters dynamic. Originally in those video games retreating troops received uber-defence against shooting damage and uber-handicaps against cc damage. It was assumed that they keep a low profile while retreating fast and don't pay attention to who's standing in their way. That allowed you to set very nasty traps:
1. Sneak behind the enemy squad with your cc guys.
2. Pin down the enemy squad with a heave machine gun/heavy bolter etc.
3. Throw grenade at them if they don't wanna retreat or your time is running short.
4. Enemy squad either dies from grenade* or runs to have it's guts spilled out by your cc guys.
*of cours in OW grenades are not that powerful RaW, though they can still frighten the enemy.
If you want you can reflect that in your house rules to balance the difficulty.
Edited by Commediante