Daisy chain alternative for a long run of V3’s

You didn’t read my comment fully.
There is no host controller inside. This is microusb. Not usba.
USB Ethernet adapter does not solve this if there is no USB hosting hardware.

Sorry but I don’t understand you. MicroUSB and USB-A are both merely physical form factors. And the camera ports (even on the V2) are not limited to power. Data transmission is eminently possible and I don’t follow your point.