Grenade has been for quite a while the mocked ugly cousin of Engineer weapon choices, only used by tradeskillers or people who, for whatever reason, choose to stay Grenade even if it means their DD is generally reduced. Since the balancing act is going to turn Demolitions into a Grenade only perk line, which means it's out of the question for most Engineers, be it PvP or PvM, since pistols and a whole range of other weapons are generally a lot better... Here's an idea to make Grenade more appealing, at least for the PvM crowd.
Just make a version of Sloth with Burst on it! You already made a ton of other weapons better through upgrades, why not Sloth as well.
/discuss