Same thing here, I'm planning a two axoloti system controlled by a QuNexus and a QuNeo.
As the axolodi does not support hubs, i plan to connect the QuNexus and QuNeo to each axoloti.
They will share the MIDI USB information through the MIDI din.
Surely the multi axoloti SPI x3 communication will be a great feature, a game changer. But i guess that it is not easy to develop and debug with all the stuff that needs to be synch'ed to avoid glitches...