No problem

And I do wish these issues would be fixed, but it seems they're more at hardware than driver level, so an audio friendly USB 3.0 port will most likely only be available on new host controllers. Perhaps Intel's 7 series chipsets with integrated USB 3.0 controllers might work properly. Unfortunately I already got a new machine with a 3rd party host controller made by Texas Instruments, and while it's not as bad as the first controllers that surfaced or some current alternatives like the ones made by Etron and NEC, it still isn't as reliable as good old USB 2.0.
Anyway, computers as they are right now, tend to have an equal number of USB 2.0 and USB 3.0 ports at best, with the more common situation being a couple of USB 3.0 ports and the rest USB 2.0. But in the event you happen to lack free USB 2.0 ports to connect audio devices, just swap peripherals like mice, keyboards, webcams, digital cameras, card readers, etc, from being plugged on USB 2.0 ports and use them on USB 3.0 ports.