Even though we haven't been after a QB actively, we're obviously not "set" at the position. As Birdman wisely noted, programs have QBs stacked when they can do it. LSU used Russell Shepard as a runner this year. Alabama and LSU have taken 5 QBs in the last four classes. Florida signed 3 QBs the year after they signed Tebow (one of which was Newton). Then they signed another last year, and have one in this year's class.
We currently have guys who haven't played and may not even play QB (Rollison, Mosley, Cooper), a guy who has played but likely is a step down from Todd (Caudle), and another guy coming off an injury who hasn't really played either (Trotter).
I would say that we have some bodies, but we're not "loaded".
I'm also wondering if part of it is Newton wanting to come here. I've read that he highly considered Auburn when he signed with Florida, plus, playing in Texas the last couple years, I'm sure he knew Luper, Trooper, or Malzahn (or all three).
I won't be surprised if he goes to Mississippi State to be a "Tebow" type in Mullen's offense (at least that's probably what he's being sold there).