The 2400 is more of the traditional approach. What intrigue's me about the 2200 is the fact that it's more flattened out making it easier to go through entries.
As for straps, I'm 6'2 and have yet to come across a bag that fell too low off my shoulders. In fact, I experienced the opposite, too short.
I've tried putting my pads in a large bag once and it's a no go. I wear 35"-36" pads. Add the xl pants and large c/a...not enough room and way too heavy on one side, bad for the back.
Wheeled bags do tend to be too heavy and the chassis do break down fast, not to mention rolling in snow/slush, the salts just eat away at the materials.