Ptrs cons are amazing, i use em all the time in 2v2. If u changed the AT nade ability they would prob be too strong
My opening build order for that cmdr:
Conscript, t1, penal, penal, penal, conscript, (upgrade 1st con to ptrs) muni cache
U upgrade the 2nd con to ptrs around the time medium tank hit the field. Use the penals for ur infantry fighting force
Without choosing a commander I could go for:
Conscript, t1, penal, penal, penal, penal, (upgrade one penal to ptrs) muni cache
Using the cons for Hoorah + normal AT-grenade to have a way faster snare than PTRS cons snare and the lower ranged penal AT-satchel for slowed tanks. I can now combine any commander, for example NKVD for flame tank with vet1 "Inspire Infantry" to get those AT-satchels in. Commisar abilities help to win infantry fights. NKVDs AT-overwatch is a real strong AT source in addition that is way better than the BombRun in the late game. Especially useful vs the big cats.
I don't see this build as such special that it is worth choosing a commander for it. Maybe it was before penals got third PTRS with higher accuracy for all PTRS(in comparison to PRTS cons). AT is the only thing this commander can do, but other commanders don't do worse at that aspect plus having better AI tools.