This is the first time I heard about changes to Voice and I really really hope they just leave Voice alone. This is the one Google product that is deeply integrated into my life and I rely on it continuing to work (it's also the only Google product I pay for). Sure it could become better, but lately when Google makes things better they usually get worse (at first, or forever).
I fat fingered a down vote for you on my iPad, sorry. I hope two passers by give you up votes to make up for it.
Google Voice is quietly used by a high percentage of colleagues as a "Line 2" to keep work comms under control and out of their personal SMS and VM, and by others as a way to have a truly portable personal number.
The only downside is occasional but serious VOIP quality issues even when landline to landline (routed through a GV number). If Google fixed that, sure seems to me GV could become a defacto identity endpoint for the mobile device generation.