i neglected to mention that I changed qcom,kpss-acc-v1 to qcom,kpss-acc-v2 in qcom-ipq8064.dtsi for my testing above (just to see...).
i'm changing it back to v1 now and will test as i suspect it does not matter
EDIT 0: i don't see an effect of v1 vs v2 for cpuidle or usb... (i'll need to do a full flash to fully test usb...)
EDIT 1: my github k419 commits contains edits for usb in qcom-ipq8064.dtsi specific to my edits in qcom-ipq8064-r7500v2.dts . This can cause usb issues for r7800 users using these patches - I'll conform to whatever the community decides as a standard.