Pjägers get added to t1, increase their range by 5, cost should be around 275, reduce their dmg output vs inf a little bit, and replace their weapon upgrade with something actually useful for their intended role.
If you gonna nerf their AI capabilities they may be too useless most of the time. MG upgrade make them pretty decent but I feel like it shouldn't cost 100 muni but rather something like 60 or more like 80 if you want make them buildable in tech. And 2nd suggestion I'd make them affected by Veteran Squad Leaders and increase their squad from 4 to 5 after upgrade. What they could get as upgrade for their inteded role? Panzershreck seems to be rather too powerful. I'd keep their MG to be honest other upgrades would make them either too powerful or useless when comes to defend themselves against any allies infantry squad.
They have Marcus and DevM for that?
Well prob they would see bugs like gatling canon on 8rad or many different things that trap us this patch and react, wouldn't they?