@LordloshBang No pro has ever said the mastiff is OP wince becoming a base weapon.
The gun is actually straight garbage due to its rng damage. I have seen the best players loose games due to hitting 13 damage.
Shotguns are powerful but what the mastiff needed wast a nerf it was a rebalance of how it works. No gun should be a lottery if you will do damage or not.
Mastiff should have been made a slug bullet that does 50 to the body and 100 to the head. Requiring decent aim to maximize it but with 50 damage set for a body shot you would at least know what to expect and it would actually be viable. (PS 50 damage at close range but should drop heavily anything past 15 meters to a max of 15)