I believe it's mostly for very low voltage batteries, otherwise the cable length shouldn't be that much of a problem.
I believe it makes a lot of sense to invert the structure, and place motor behind because they have a solid axle already, and prevent it becoming too rear heavy given it's a cargo van.
I also can't really imagine how power electronics, moreover for such a small car can get so big.
Patent claims are clear as Soviet era Sci-Fi films so that's not worth discussing IMO. What I found interesting is this is a preview of 1st-gen purpose built Kei EV platform and that it has motor compartment directly below the seats.
For your second and third point, this is for small, cost efficient delivery vehicles. Consolidating as much active components into an "engine room" and close to driver's seat is likely given higher priority than pursuing driving dynamics. Like if they could cut the cost for brake lights by replacing them with plastic light guides they absolutely will.
I believe it makes a lot of sense to invert the structure, and place motor behind because they have a solid axle already, and prevent it becoming too rear heavy given it's a cargo van.
I also can't really imagine how power electronics, moreover for such a small car can get so big.