1) I think JFD still has cache among men (and women) of a certain age. The same age likely to buy season tickets or cajole their company into buying a box.
2) Brits, which I-Drive has in abundance, will show up at least for one game in their time here. It's a novelty. Not traditional tourists, but I could see a lot of transplants driving an hour down from The Villages to see their old home team play. For that matter, Orlando itself is still largely a melting pot of the entire country--look at our sports bars during NFL season--I think any visiting team could draw a a decent crowd of former hometown fans.
That said, I agree traffic threatens to be an issue, they'll need to finally get the Aquatica glut in Summer under control.