Strange you should mention the iPad1 bezel, as I still think the edge/bezel on the iPad 1 looks engineered better, but that's probably because I'm rather oldschool, and inclined to over engineer something..lol. I'd have been quite happy retainng the shape of the ipad1 certainly around the edge anyway, as all the plugs pushed in better as they were flush to the edge, as long as I could have the insides updated of course and the same screen as the iPad3 obviously.
My wife uses my iPad1 now, but when handling my 3, I honestly don't notice that much difference in thickness or weight, but I'm sure the glass on the iPad 1 is thicker and therefore more robust, whereas the thin edge of the iPad2 & 3 dictate that the glass assy is very likely much thinner too, and I'm sure far less likely to survive any rough handling... ah well.. I suppose we have to move with the times...lol