I would like a possibility to make some substitution during a scenario, to reserve a unit and bring another in a game. For example to be able to sideline a fighter once the air superiority is won, and to get a tank or another ground unit from the core army in the field. Of course the number of subst...

Upgrading units at a smaller price than buying them for new. For example, selling an old tank to some allies or even for scrap could bring a discount when purchasing the new equipment. Now, you just move the crew with all experience bonus into the newly purchased equipment bought at full price. So, ...