I strongly agree with this.

I personally find it way more enjoyable when the duty is voiced. I particularly liked the latest Alliance raids because all bosses were voiced. It really adds to the experience, especially when we get in for the first time and discover the bosses' designs and what voices were chosen to match their personality etc.

I hope that we get more voiced duties in the future, whether it's in dungeons, trials, raids or even Ultimates (especially considering what the next Ultimate is going to be, it'd be awesome to have voices.. it'd be so sad if we don't get any).