As for the usb issue...the only reason it requires all the USB 3 ports is for power, USB 3 has to provide more power than 2.0 as standard so this isnt really a bandwidth thing just a way of getting rid of cris crossing mains adapters which tbh i think is a huge deal
A powered hub will solve a lot of that, I cant believe that the position tracking information will get anywhere near the bandwidth capacity of a single USB3 port