I agree. I don't use video recording at all on my Nexus, so that is a nice to have. Especially as the recording doesn't really working on other 3.x versions either.

About the issues during the calls. Well, I have to say it is always present at incoming calls.
Today I tested a bit and it seems the audio and microphone are muted by default for the incoming calls. Therefore right after I accepted the call I needed to push the volume up with the volume rocker and had to toggle the microphone icon. After this, the call worked and we could hear each other.
BUT! For incoming calls if the other party disconnects the call, at my end the call somehow remained "active". I am not sure how to explain it but if next time if the same caller calls me, the phone thinks there is an ongoing call in progress and offers to put the old "active" call on hold/end and accept the new one.
This is strange and I didn't find out the reason behind. Even if I restarted the ofono and network, didn't help, just when I rebooted the phone.
Interestingly the outgoing calls work ok.

So I welcome any help and test on this area.