Yes, the audio IS better on the CV1 but adjusting the settings in Windows works wonders, and just like the black levels (which aren't great on the CV1 anyway) you get used to it.
No need for a physical IPD adjustment for me cos my IPD is 64mm so the headset is perfect for me. And the finger tracking is dxactly the same as it is with the Rift Touch controllers too so not sure what you're referring to there? And for me the Rifg S has a BIGGER FOV too, must be down to the shape of my ugly mug or something.
I've also noticed that the FOV is DIFFERENT compared to the Rift, it's more like looking through a scuba mask rather than a pair of binoculars. I much prefer it.
And the tracking is pretty good now, it's not perfect compared to three sensors but it isn't far off.
It's also A LOT more comfortable to wear too.
You can also supersample the exact same amount as you would with the Rift which makes the clarity even MORE noticeable.
I wouldn't swap my Rift S for my old Rift, the Rift S is MILES better.