Guys I love dual threat QBs but it' s not a requirement to have a great offense. Most all of your QBs at the high octane offenses around the country are not dual threat guys. It depends on the offense you want to run.
We of all people should know that it's not necessary to have one especially in the "Air Raid" type offense (I hate that term by the way). Couch couldn't outrun me but he was perfect for that offense because he was smart, quick thinking, had a quick release and was accurate. He also could manage the short passing game and by that I mean he had a feel for it and could find ways to fit the ball into small spaces for the screens, delays, dump offs etc that are so crucial to making this type offense work. He had a feel for it. Patrick, bless his heart couldn't complete simple screen pass because he didn't have the touch to draw and drop the ball to the back. Couch was a master at it but keep in mind Mumme drilled that non stop. Couch and Anthony White and Craig Yeast could run the plays in their sleep and they could improvise to make them work between each other.
So it's not as much about the QB as it is the offense. The so called Air Raid was not about a gunslinger offense, it was about using the pass as a running tool. Short quick outs, slants, delays, screens that spread out the defense and make them run and chase, then hitting them with a down field out or cross or post.
Towles and Barker are not Couch in a lot of ways but I think they would have looked much better in a Couch/Mumme offense. I put it back on Dawson for not putting these guys in position to succeed more. You could see the few times we moved the ball effectively (see beginning Auburn game) we went tempo with short passes to move the chains, then mysteriously we would abandon that ever game and watch our guys get sacked over and over trying to drop back and throw 20 yard outs. I don't think either would have produced the same results as Couch because they aren't as talented especially in the "feel for the game" category, but I think both would have shown more if we had truly been running anything close to the old offense Dawson supposedly came from.