Hello Tim, thank you for making us aware of this. As you suspected, the power is likely too high for that many Morphs. You could try a powered USB 3 hub or a USB 2 hub that supports more current.
Programmer, in both contact mode and force frame mode, the amount of data sent depends on the number of contacts but is generally very little data. In contact mode, 1 contact requires about 2.4 KB/s, 2 contacts requires about 3.6 KB/s, and the current max (16) only requires 20.4 KB/s. The same goes for force frame mode. A majority of the sensing elements are 0 when not pressed on. Using lossless compression we can offer a very low bandwidth (approx 6 KB/s for 1 finger and 25 KB/s for 5 fingers). If the whole sensor is being compressed, the communication is higher, but should not be a problem for the 20 MB/s limit.