According to Magner, the En Masse QA team's been flooded with requests to join the testing and feedback process as they continually poke and prod at all of TERA's systems and content. "At this point," he says, "we've played every class and race multiple times, but no one is tired of coming to work."
The team is currently testing fights against "Big-Ass Monsters" in the Celestial Hills, and Magner says he's still learning new combos and techniques even after a full year of testing. While the testing team usually is far out of the spotlight, he says that its job is crucial to the game's success and that all of the testers are "you" at heart -- passionate gamers who want the best for this title.
[Thanks to Joseph for the tip!]