HONESTLY they need to limit sales of tickets if they are worried about crowd control. They are not however, as they are trying to raise the attendance numbers every years and compete with other large events (the basically want to become Canada's ComiCon). The more people they back in the more credit they can bring to attracting guest and venders.
The jump in price has nothing to do with crowd control. The $10 price jump every years is to cover the slow rental increase but I bet that about 70% of that price increase is going straight to their pockets.