It is not because Brits and OKW are just better at long range infantry combat than Soviet Counterattack Tactics which have no good long range infantry. Obviously an infantry unit that stops sprinting when getting shot at profits a lot more of the accuracy bonus if it is suited for long range combat. A short ranged unit like Shock Troops would be better off to sprint closer since they deal way less damage at medium range even with the accuracy bonus. That is a real simple logic, so be careful about calling out such things.
Yes sheock troops could yolo charge with for the mother land and even get easily kill on retreat and this why the the ability changed (for every faction.)
That was as you admitted that made the ability "too strong".
Clayming that the ability does not benefit Soviet unit is different story thou.
Regarding Penals: They don't need 15% accuracy since they hit every vehicle in this game automatically at Vet0. Should you fight infantry they get a huge accuracy bonus with Vet and Vet1 ability to the last man already. Penals are a design flaw regarding the combination of PTRS and their Vet, they are the least ones needing more accuracy. They should be vetted when FMR is available.
PTRS vs vehicles is not really very relevant.
Both accuracy and received accuracy bonuses coming from FMR help Penal troops perform better at all ranges.
Claiming that penals do not benefit from this ability is simply false.
Other support weapons get bonuses also.
Regarding Maxim: If the accuracy and thus killing capability of an MG gets too strong its ability to suppress drops. Somebody around here explained that mechanism at the Vickers a while ago. The least you want is less suppression on Maxim.
I'm not completely sure about the effect at Maxim suppression (how it works out). Anyways Maxims are not the main body of troops at Counterattack Tactics, a combination of Shock Troops and Penals synergizes well at this commander. But both don't really profit enough from FMR.
That is like saying that HMG-42 does not benefit from AP rounds that increases accuracy (and damage)
Claiming that maxims do not benefit from this ability is simply false.
The only thing that does something at least.
But as I said factions are different. Old FMR factored that in, the patch nerfed it in the wrong direction. Regarding Counterattack Tactics + Soviets design it should have nerfed shooting not moving.
The changes was in correct direction since it no longer "press a key get squad wipes" ability and it is similar for all faction.