Ambush bonus applies to Shreck also so they do not really miss the much once at vet2.
Tank hunter partisan did not get reload bonus they used to get 10% penetration bonus.
In sort the unit is cost efficient and remains useful though out the game either as an AT unit or a scout/ (ambush unit) and simply do not "scale horrendously". As I pointed the unit simply can not carry the commander.
Lets take a step back because both units got the first strike bonus at VET2. Overall, AT partisans are worse then they used to be.
Unlocks the "Concussive Trap" ability.
+10% penetration.
+30% accuracy.
-16.66% received accuracy.
+50% accuracy when firing from camouflage.
+10% accuracy.
+20% reload speed.
-23% received accuracy.
So they don't need to rely on camo to avoid damage, it didn't matter if first strike was better as it got both acc and damage. Also I don't understand how the bonus ACC is better than faster reload. The partisans should be able to shoot from around mid range distance so I wouldn't expect them to miss the first shot. It is the 2nd shot that matters late game as shreks take quite a bit longer to reload so the 5 sec acc bonus is useless whereas the bonus reload could be the difference between the vehicle getting away or not, especially if the unit is vetted.
I get what you're saying about player preference, its just an idea. Do you remember if it was 2 or 3 PTRS? As my idea is to avoid using the Penals as the AT unit with a cheap alternative. Thus allowing more synergy with T1. I think if players got a chance to try out a triple PTRS cheap camo unit they would like it as I believe the old Partisans had the old PTRS before they got major buffs.