I've been going to GenCon since it moved from Milwaukee to Indianapolis, and the one thing that I can say has definitely changed in the last 15 years for RPG's, is how few there are after exhibit hall hours or overnight anymore. And I don't mean they need to run all night, I mean just even starting at 9 or 10pm til 1 or 2am.
Back when we were first coming to the con, the day time was primarily for the exhibit hall and maybe some workshops or symposium type events. When the hall closed the next 8 or so hours was pretty much all gaming all the time. Now I see very few RPG events that start after 7pm anymore. It's become a competition of my time between the events and the dealers hall, and it probably hurts both of them in total overall. I have to pick one over the other based on how important the things are, and I probably spend less overall on both because of it.
Other than PFS, which I don't participate in at GenCon, and don't have a local store to really do so back home either, there just aren't many games. I wonder for the independent GM's what drives their schedule and when the decide to run events?