I've been catching up on some recent podcasts, and I came across the price increase rant from early August. I will start by saying that I agree, this is a lousy PR move, but I can't agree that this it's a bad business decision. Park attendance is up over last year, revenue is down. The reason behind this is that the park patrons aren't spending as much on park purchases (souvenirs and dining). Increasing park ticket prices is a method of getting increased revenue from the increased attendance; in fact, it is the only way to get increased revenue when in-park spending is down. Add to this the fact that crowded parks also increase employees's hours, which in turn increases their wages. Now parks are being asked to entertain more people while generating less revenue. Something has to give. Either they cut hours of operation, which further limits the possibility of in-park spending, or they raise ticket prices.
As a side note, charging a premium for the dining plan is in response to guest demand (supply/demand); fundamental economic principles dictate that increased demand increases the price. If this increased price decreases sales of the dining plan, we'll see this pricing structure done away with.