Glad you asked. Here are 4 simple ideas off the top of my head (and I got more if you want them)
1) Before EVERY home game, have 2 former SU players at the Dome taking pictures and signing autographs for all fans. Put one in the concourse in the 100 level behind one endzone. Put the other in the opposite endzone. People love FREE, people love autographs and most important they love pictures they can put on their Facebook/Instagram/Twitter. You give fans a moment with a former player, AND you are encouraging them to get inside the Dome earlier so they will be in their seat for kickoff. If someone is on the fence of going to an SU game one week, but hey if we go we can get a picture with Rob Konrad or Dwight Freeney, or Justin Pugh...whoever. That may intice them to say lets go, maybe we only stay till halftime but you got people in the door and you give fans a MOMENT with a former player.
2) You have the quad which is totally mis-used. In Syracuse/Onondaga County the Taste of Syracuse, Italian Fest, Polish Fest...ech and all of those things draw huge crowds in the spring/summer. Food Trucks are popular right now. Have about 5-10 food trucks in the Quad with all different types of food. Way for husbands to drag their wives and girlfriends to games. Hey you may not like football...but before the game for 2 hours have a few drinks and lets try some various foods outside, it will be fun. Keyword is "FUN". And for people going to the game, a way for them who may not be into tailgating because that's a lot of work and prep, to go early and enjoy the nice weather months outside in September/October when the majority of SU's home games are.
3) The in-game experience, I understand you have your paid sponsors like Turning Stone who wants to give away $100 or whatever during a TV timeout. And the seat upgrade, those things aren't going away. But sit down and go over the 20 or so (or whatever the number is) of those bits/promotions and be like, does this work or doesn't work. The ones with no sponsor's behind it, be honest and be like this one really is just taking up time and adds no value, let's find something better. The ones with money behind them obviously will stay
4) You have a dance team and a cheerleader squad. Again, fans like pictures. At every gate walking in the dome have a member from the dance team and/or cheerleader squad there to take pictures with kids, family's, or any fan who wants them. Put smiles on peoples faces walking INTO THE DOME!!!
This isn't the 1980's and 1990's where the "game sold itself"...those days are gone and not coming back. People want an "experience" or a "moment". They want to share that on social media, they want to go to an "event" and not a game. For the older crowd, (which I consider myself to be part of at this stage in life)...I don't get it. But I see what the younger generation wants and what other stadiums do when I go and that is how they build that party and FUN atmosphere. Syracuse is really lacking!
And what I laid out may not make a difference TO YOU...but this isn't about YOU or ME...it's about what the modern sports fan wants and expects in going to games these days. They want more than the game! And Business 101, give the customer what they want!