SEASON PREMIERE: Even though this series is beginning its 12th cycle of competitions tonight, there are a couple of reasons to tune in. One is that, this season, the structure has been revamped to give Tim Gunn even more prominent a role. The other is that a controversial billboard promoting the new season, featuring Gunn and host Heidi Klum lording it over a gaggle of naked models, has gotten people talking about the show even before its season premiere. Nice move.