Role Players are all in the hotels that are squirreled away in rooms with doors. That's the perfect place for them. People will go to the RPG's no matter what. They don't need to be visually present.
I was doing games that were visually cool looking that usually draw in a lot of generic tickets from people looking for something interesting. We rely on foot traffic.
Putting someone like FFG out in Lucas Oil makes sense strategically as people who play in a lot of FFG games don't really play other events much. They take up a lot of space. They could OWN the space. It would not likely happen, though, due to the prestige of having your stuff front and center in the main hall.
EDIT: I should also say for those that are doubting how much of an impact it had on our events. We would get a lot of walk ups and generic tickets as we had really interesting tables with a lot of fancy terrain. That, and it's Star Wars games. Everyone loves Star Wars. We had a lot of walk ups last year when we were in the main hall (close to where Blizzard was this year). Instead, we were in the far, right corner of Lucas Oil. Few people wandered as far back to us as last year. It really did affect us. There were a couple of people who did make it that far back that were really excited to find us and that was really cool. :)