I understand that an integrated VoIP system will have an overhead on the server. What ever reasons are behind the technical issues with VON, I do not know.
I'm just in support of it being improved.
I also consider an integrated system to be more convenient. In my experience in public servers many players may not join a 3rd party solution. Servers can enforce this via admins of course.
As for unwanted noise in say Side chat, it's just a simple matter of asking those to clear comms and use other methods. Most people will respond positively. For those with comms bringing nothing to the game, a simple mute is in order.
My apologies if this is going off topic. Although there is some relevance.
All a matter of preference I guess.