I'm behind this but I'm also in the same camp that feels like programmers, artists, and sound design should get a first crack at this.
Some people have asked why they can't all unionize, but the concern that I have is that if this campaign succeeds and is dealt with first, companies may not necessarily stand for another union and will go out of their way to minimize the amount of aquiescing they have to do down the road for those unions that form after the first. Note that I have no formal education in economics or trade labour or work rights, so if this has not been historically proven or studies have shown otherwise - do prove me wrong, as I would rather have the correct handle on this. The following is otherwise based on this assumption.
As much respect as I have for some of the voice talent that we have in this industry, I can't help but feel that programmers, artists, and sound design should get a fair crack at this first to maximize their benefits, considering the over time, burn out, and hostile practices that we know most regularly go through. Temporary contract work is the norm because employee benefits are an expense that big companies do not want to pay.
My understanding is that voice actors usually do not work over time (but please correct as necessary). I am not aware of burnout but recognize some of the safety risks in motion capture. They are on a contract basis, but that's in the nature of performing arts (since by design the profession is meant to involve giving a performance for a set production as auditioned).
Am I saying that voice actors don't also suffer? No. But I can't help but reason that production staff should get a first crack because there is more to petition and therefore gain from that group in a "first attempt".