I apprecaite the effort, though I'm afraid this has been known during the demo. It's just highly unused in tournament play. I believe
Zyphox makes a pretty good point, that why waste the meter when you can dash in. Still it's good you raised it up, it still needs more discussion in my opinion.
So far, I'd say MBDC is best used punishing interactables. For example, the water in the aquaman stage, or even the trash can on gotham city by gadget characters (which can also be jumped). It may also give better options for punishment on wakeup, or other types of moves, but at the moment there's not a whole lot going for it. (heck I feel they should buff this feature, either reduce the damage, or make recoverable health).
Although, I can't say it's been fully explored, I wouldn't mind seeing which moves can be better punished with MBDC. Also Zoidberg also had something similar to this as well.