I've been trying out the weapon, and I've found it to be enjoyable.
Splat Charger's nice range, coupled with the sprinkler allows for some great defensive presence. The splat charger alone is already a really useful tool for countering literally every other ranged weapon besides the E-Liter. As the splatlings are all outranged, and so is the jet squelcher and squeezer. Not to mention, a single shot can take all of these slow weapons out. But this kit really shines with the baller, letting you finally push up without much risk.
It's a get out of jail free card, or it can be your strategy to take back the objective with a massive amount of burst paint and walling potential. While Baller isn't a standard for backline weapons, I think it carries it's weight with the charger.