One could also try to make the unit allot better vs "light vehicles" by adding an ability desing against those unit
One approach could be an ability or fire mode with lowe penetration and ROF but that slow light vehicles on penetration something inline with the USF mine.
Dedicating a (vet) ability to a single lv per game is more like a nerf imo. Assuming you replace tracking ofcourse.
I at least woudnt even consider it, if it keeps its current timing stats and cost if becomes specilized for light at.
Against ost the su76 is 100% fine imo. Against okw a bit less but nothing wrong with that.
It just arrives late, same as the m5. At the end of the lv fase. Backteching to or just teching t2 makes sure you have the siz3.
Its timing, low late game at power, fragility and easy (back)teching to zis3 make it less appealing to get.
i like the stun/slow idea. It promotes combined arms and give late game use. But it wil be an heavy rng dependant ability esp for heavy armour wich axis do not lack. I dont think it see much use. It will still limit it to lights and meds.
I think reducing cooldown for the barrage and mobility buff is what it needs next to reverting tech cost for backteching t2. Tying ptrs and at satchal to at nades will also help here.