I haven't been to a bowl game in Jacksonville, but I can tell you from personal experience that San Antonio is just darn perfect as a bowl game destination.
What gives San Antonio the edge in terms of bowl game destination is that the Riverwalk is a common area where all of the fans can hang out and have fun. Tampa would rank second and then Orlando, Miami and for that matter Pasadena would all rank far behind from a venue perspective.
Even with 50K+ people running around in Miami-Dade for the Orange Bowl after the 2002 season, there simply wasn't a common place where you knew everyone else would be. As much as the Rose Bowl is very exciting to think about, should that happen, you have lots of Hawk fans in the LA basin, but there won't be a single place where everyone "hangs out". People will simply be scattered across the entire LA basin while they are there. From that perspective, San Antonio tops them all.
With that said, I also think it's good to mix up the venues at the same time. Looking over the past years, the Hawks have been to the Outback 3 times so I think shaking up the B10 games also has some value. I would like to have seen the B10 keep the Alamo, and perhaps swap the Gator for the Cap One?