AT weapons sniping infantry are bad design, no matter if it's Panzerschreck or PTRS. Although, PTRS should have AI capabilities when it's used by Guards or partizans. But a change like this on you main line infantry is bad. Take a look at OKW. Why we are frustrated by SchreckBlob? Because you turn you AI core unit into laser guided tank hunters. Any drastic change to mainline infantry has the potential to break the game, because they are spammable and cheap.
Gonna say it again:
-PTRS destroying crewed support weapons is not fine.
-Everything else is fine.
Thank you.