I wish that speed could offer a modifier on damage recieved and damage taken so that their might be some tactics. Also I feel like it could be very interesting if you slowed the knights somewhat and added archers to the mix on the enemy side.
I love this game but I will say this there needs to be a hierachy of preferred soldiers. There is nothing more frustrating than having two vanilla soldiers in your squad freeing an AA specialist and having the AA specialist walk off because your squad is full. Ideally what I'd like to see is a list of the units that we could arrange to our liking so if the squad is full and a unit is freed that unit is compared to the list. If the soldier freed is higher on the list than a soldier in the squad the new unit replaces the current in squad unit who is ranked lowest in the players list.