Hi, for what it's worth, I measured the TP1 under load and in idle with older armbian image (where the switching is enabled), and I measured 1.1V and 1.3V. I have the Orange Pi ONE with AX3833 regulator.
So hopefully the overvolting is not a systematic issue.
Ad: Power consumtion is 1W in idle, and 2-2.5x more during some load.