PTRS on Conscripts seems like a good fit to me, since you aren't giving up too much AI (unlike PGrens, for example). I think this seems like an interesting doctine, and one which may actually be quite good in 1v1 considering that we expect the call-in system to be heavily overhauled. At the moment, Soviets are relying pretty heavily on call-ins to counter armour, and this doctrine seems to offer an alternative, low-tech option that is more flexible than AT guns.
Yeah, I think that conscripts with PTRS can do really well against axis armor. My only issue is that lategame I don't know what can do that doctrine against a King Tiger, a Jadgtiger or such.
Non-doctrinal tanks currently are useless against those beasts, and PTRS, even spammed, will be useless too. Mark Vehicle will have fit perfectly with that doctrine.
Even so, the main problem I see to the doctrine is that without Guards or Shocks, axis doesn't really need armor to win. Schrecks, fausts, Paks and eventually a heavy tank are enought to rape all the T34/76 and SU85 soviets can make. Penals and conscripts should be really buffed to make this commander alluring.