After using the unit for a while now, the multi-function knob has not grown on me. It stinks.
It's too shallow, slippery and insubstantial. Using it to adjust volume is like trying to rotate an oily washer lying on a flat surface. A volume knob should have a robust feel. This knob feels like handling a dried leaf with your fingertips.
The next-gen knob should be knurled, or include some grip-able surface like rubber. Having it protrude more would be preferable too, but that might create damaging torque on the swivel joint. I'm on the lookout for the right size rubber band/electronics belt drive/wire shrink tubing/etc. to improve the sitch for now.
I got carp (wooters will understand) when I mentioned this a couple months ago - the rebuttal being, hey it is what it is. That was before I lived with it. I know we've all been obsessed with the software issues of the F-Series, but I'm posting this for the record in the event Pioneer looks to A-411 for next-gen pointers.
Please offer a better knob.