I don't think I completely agree with your assessment. BTW, I have the new 15" dock for the i5 mbps.
The plastic feels solid to me. I don't foresee the cable partitions breaking, but I guess time will tell.
I, personally, only have the power supply, a single usb port, and the mini display ports occupied and find that my laptop slides in effortlessly using its own weight. Having all of the cables stuffed in the base with my minimal setup is without problems, as you can imagine.
I've also never had the cables "fall out". Maybe you need to tighten the hex screws, or maybe I don't move the dock around enough to experience that. Either way, I've yet to experience a cable falling out.
So, yeah, using every single port, as you have indicated, might be problematic (I haven't verified this myself), but if you don't think you'll be using every port this dock helps a great deal with desk real estate and cable management.
Anyways, I guess we've had different experiences. I'm really digging my henge dock.
BTW, did an
unboxing and short review here.