They gotta figure out how to get mom's attention. In the age group that they're desperately chasing (25-45 year old parents), mom makes the schedule.
Dad wakes up on Saturday morning and thinks, "man, it would be nice to get out to Cajun Field at 10am and start pre-gaming before kickoff at 4". Then gets quickly corrected that Timmy has a soccer game at 11, daughter has dance practice at noon, we have two birthday parties on the same day, and grandma and grandpa want to go to lunch.
They posted about the Spring Game plenty, but it's just another game. In one ear and out the other. They'll get some buzz from the new stadium opening, and a little more from Walker Howard, but that will wear off VERY quickly.
Others have posted ideas about what would make gameday an event worth bumping some kid's birthday party, or the farmer's market, or lunch with grandma, etc.
If I had to guess, success would lie somewhere near a blend of:
1. Tailgating festival -- give people a space and a reason to stand around the stadium all day before the game. If you want 25k+ inside CF, you'll need 40k+ standing outside. They will NEVER get 20k people just off of 'drive up before kickoff and go straight inside' traffic.
2. Anything that you do well inside the stadium, market the hell out of it. This is a pretty short list, unfortunately. We're still looking for our viral moment like Callin Baton Rouge, or videos of the entire crowd singing Neck that get 2+ million views.
The media and graphics department at UL has improved by leaps and bounds just since Hudspeth was here. We have the tech talent to put out great content, unfortunately there aren't many 'viral' moments about the gameday experience for them to promote.