And its vet 0 performance is already very good in the hands of someone who can micro it well (using attack ground), which is exactly the reason we're reluctant to directly buff it.
This is the problem with it really: it's an ostensible autofire AI unit that needs constant manual input to function.
If it's too powerful with the shells sped up, tone down the damage a bit. If it's too good against tanks, tone down the deflection damage.
PIATs got reworked for the same reason.