Just a question - what would you like to change about units?
My suggestions:
1. Zombies - remove FAST for sure (fast? zombies? come on!) and replace it with CHARGE (Zombie seeing enemy will rush towards him). Keep the DAMAGE RESILIENT skill but drop armour to 2.
2. Foxtrot/Rosie/Sniper Grenadiers/Observers/Angela - drop armour to 1 - light armoured units who prefer to move silently and stay in cover (snipers) and girls who are not carrying too much armour
3. Blackhawk - extend range of Dual Piat to 3 - 2 is a crap. 3 with FAST is nice but not overpowered.
4. Hermann - 1/4 against all vehicles. I suspect that's why he is carrying this big laser weapon.
Any other ideas?