Because Ogryn’s melee arsenal is already so tiny, and the list of viable weapons on Gunlugger is even smaller, the feeling was that we didn’t want to add even more melee weapons that those builds couldn’t use effectively. For comparison, a chainaxe special heavy also kills a Mutant on a Sharpshooter Veteran build. I fail to see why ranged Ogryn builds can’t do the same with a similarly slow special attack on one of their weapons.
So Ogryn tree and blessings like Brutal Momentum need rebalancing, not the shovels imo.