Why can't we just have a very long cooldown on callin units? For example 15-20 min cooldown on heavy tanks. They are meant to be supplementing your army not being the core of your army. Losing a Tiger for example should be like losing a queen in chess, yes you can get one back but you should not base your gameplan around it. With a cooldown mechanic you would fall behind in tanktrading if one player used core units and the other only callins. A fix to soviet worthless core units has first to be implemented for this to work ofcourse.
The best games of coh2 i have ever seen has been between two players who just had an agreement on not to spam callin units and those games reminds me on how good vcoh games used to be.
