There’s one flaw in the design: frontal cross section. They sit as low to the ground as a sedan, but are as tall as a crossover. This makes their aerodynamics terrible.
I’d still prefer one over a crossover, because we haul things on a regular basis and a minivan with the rear-most seats out would be more practical for us. Nobody makes an EV minivan yet, though. Closest thing is the Ford Transit EV, but it’s only sold to commercial customers, and its range is limited.