I got lucky, I actually like the new grunts more than the actual voice I chose. It feels like they wanted to update the system, couldn't get all the voice cast back as some of them would be from ARR days which they totally swapped out when HW came, but still wanted to do it anyway.
It feels like a band aid fix till they fully re-record them all, which I assume they would whenever they commit to the character customisation overhaul Yoshi talked about a ways back.