They had serious offensive problems last year too, but it was covered up by the defense and the anointing of Saint Tebow.
In 2008 UF scored almost 45 point a game in their 8 SEC games. Mullen leaves and in 2009 they score around 25 points per game in the same 8 conference games. A two TD drop in offensive production is significant and then to lose Strong too is considerable.
Tebow can be replaced. Good coaching is harder.