Some of you might have seen my response (in "Shopping") to the guy wanting to carry half a ton of canoe gear... and on rough roads. We already know that's not going to happen.
Recalling some structural engineering classes from a zillion years ago, his question got me to thinking that the weight capacity issue with the E may simply be one of too much unsupported structure. That extra-wide pillarless door opening leaves a lot of area in the vertical plane without visible means of support. Too much weight, and I'll bet that you will experience measurable distortion in the body structure, especially diagonally across the side door frames.
:shock:
This sent my head spinning about the reported problems with 1) the windshield cracks and 2) the back side doors not latching, or rattling and clunking, or other problems indicating adjustment or alignment problems.
In other words, I think people are "bending" their E's, with linear flexing in the vertical plane on each side, plus torsional flexing. It's the torsional flex that's going to crack windshields, and the linear flex is going to mess with the doors. Neither should be happening, but in my non-professional engineering opinion, both would be no surprise at all... at least not to me.
I'd be interested in what Honda has to say about this. There might just be some added under-body bracing in my future E's future.