I've been in contact with Glynnis on and off through out StarCraft 2's development, and she voiced 2 trailers that were used at Blizzcon last year. This combined with the bits and pieces we've heard from the new VA gives us enough to make comparisons. That's the reason we're making a big deal about this - we've HEARD Glynnis as she is now voicing Kerrigan, and we've also heard Tricia, and the vast majority of the fans, especially those most interested in the single player campaign seem to prefer Glynnis's performance.
With Blizz bringing back Robert Clotworthy after all the talk about "bringing Raynor in a new direction" it seems ridiculous to suddenly do that for Kerrigan - especially given all the positive reviews on her voice in the original game, and the positive reception to her performance at Blizzcon last year.
You'll note that LAST year, no one was bothered by Kerrigan's VA, only by the Zerg reveal trailer - not voiced by her. However- there was a LOT of talk about getting Raynor's original VA back. Now that he's back, everyone's quiet about that.
Instead they've changed Kerrigan, and the fan base is letting Blizz know that we really don't like the change compared to the original. I'm not saying Tricia will make a horrible Kerrigan, I'm saying that Glynnis will continue to make a FAR better one.
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