[001sky]

Obviously not a "deep v" shape nor something blast resistant, perhaps but some form of deflective geometry might be helpful under the car. It does seem the force ultimately is going ^up^ as opposed to >in< . . .

[Havoc]

It might help in a couple of fringe cases like debris hits. You'd murder the aerodynamics though.

Pretty much every other area will suffer too - handling, aesthetics, fuel efficiency, manufacturing complexity, battery replacement etc.

Its just a horrible trade-off.