While I am not pleased about having to acquire 3 extra commanders that aren't included with the british forces, I just hope that Relic do a sale for them if you've pre-ordered, like the sales that were happening when the store first launched.
Brits seem to just be "Fuck OKW: the faction".
They have their own bigger and better AT and flak emplacements, eliter commandos that melt elite Obers and ridiculous indirect fire call ins and general commander abilities.
Then you have the AVRE and Crocodile wiping up volks blobs and forward trucks to top it off.
SU-76s are very good now, I agree.
Mix in an M5 quadmount and nothing can beat you early game until axis bring out the big guns.
Although by that time you should be on to your high end call ins and equivalent big guns.
And if you have 2 or more SU-76s you can just barrage infantry with one and smack down vehicles with the other when the enemy tries to mount a combined attack.
I can't think of much ways to 'nerf' the thing without making the barrage a vet ability, seeing as it is free unlike the ZiS-3.