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.)
So changing it for moving like "From Cover to Cover" or "Tactical Movement" would have done the trick too and would have fitted the commander.
PTRS vs vehicles is not really very relevant
That is a very, very funny statement. I do think I don't need to comment that any further...
Shooting at vehicles accuracy bonus gets you absolutely nothing, shooting at infantry it depends on target, range and vet of penals. There are enough ingame situations where you will automatically hit with Vet without FMR bonus. One example shooting at weapon team crews. Overall Penals get less out of it in comparison to other troops because of PTRS and high own acc boni.
For Shock Troops it is just plainly awful.
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.
You miss the point since the main role of AP rounds are beeing a soft counter to light vehicles. Furthermore the HMG-42 has such a high suppression that a higher accuracy shouldn't lead to the situation that you suppression is worse by killing squad entities. Anyways as I said Maxims are not the core of this Commander, only some optional supplement. And this was not my main matter, so lets not derail it anymore at this point.
The changes was in correct direction since it no longer "press a key get squad wipes" ability and it is similar for all faction.
Its okay that is no Squad Wipe button anymore. But by making abilities similar you have to take into account the different faction traits. If the commander would come with Airborne Guards or Assault Guards which both would greatly profit form current FMR it would be another thing. With the combination of Shock troops and Penals it was nerfed in the wrong direction. The ability should focus on movement and not combat buffs. Please no "standardization" without thinking about game mechanics of certain commanders.