Imo CP 0 call in infantry should start on (half?)cool-down like osttruppen and/or their cool-down after the first call in should be longer.
Generally infantry available before minute one should start with lesser weapon and have weapon upgrade available to them lock behind tech so that they can be on the same power level with mainline infantry.
Assault grenadiers could be move to CP-1 or even 2-3 and buffed accordingly.
