I respectfully disagree. Mainline infantry should support doctrinal infantry, not the other way around. If doctrinal infantry replaces mainline infantry, as is with the case of Panzerfusseliers, the doctrinal infantry needs to be toned down.
Trying to balance things on a doctrinal manner makes thing more complicated. One has to start from base.
For instance a doctrine can have a singe unit that is OP and the rest of the abilities to UP so in general the commander can be fine, although the specific unit can be OP.
In addition since one has to produce units before he reached the CP needed to call in units fixing these unit first is more important. As an example USF have great call-in infantry like paratroopers that see little action since riflemen are a very solid unit.
On the other hand one has to keep in mind that, far DPS wise, PF are about the same with Penal squad that hit the field allot earlier and do not need a 90 mu upgrade. They even vet faster and get powerful bonuses earlier.
So one has to first fix the unit that are available before minute one, decide in what level these units should perform and then start adjusting units that come after them.