Yes, I stuck with all the grounds bundled; I successfully resolved the issue before I tested a dedicated ground. I know VBLUE42 had issues with ground sensitivity, but maybe it has improved with the latest PAC version 1.68.
Also, I know some other people have had issues with a slight delay when they press the steering wheel buttons, but my response seems pretty instantaneous. The nice thing about 1.68 is that I was able to program the Mode steering wheel button to trigger voice recognition on the AVIC, which I find really convenient.
FYI, when you program the PAC, you need to move