Man, I've always wondered what the hell GBX were thinking when they came up with these Grenadiers. High ammo consumption, long reload times and a trajectory that basically dribbles out balls of disappoint, as if though the gun itself is saying "why bother?". Like it knows it sucks.
I've tried using the Bearcat in the past before (on multiple occasions actually), but I've always had to really scrap the bottom of the barrel for a reason to continue using it.
A buff that would substantially improve the viability of Grenadiers across the board would be to give them splash damage. That's it. Just a flat 90% bonus in the form of splash to standard Grenadiers and 100% to the Bearcat similar to how splash works with the Ogre and its Torgue AR counterparts.