I'm not defending it, but I understand where the thinking is grounded.
I'll go a step further and defend it. I think holding the line for the most part is the right move, HOWEVER, they also have to meet guest expectations with regard to VALUE.
Disney does view themselves as THE destination, and rightly so. But maintaining price is only a piece of the equation. When you charge more, you've got to offer more, and that includes NEW attractions, hours, entertainment, service, the whole package.
Yes, Disney does clearly offer more than Universal, but that's not really the issue. The real issue is that Disney is offering less than Disney did in the past, and the perceived gap between them and Universal is shrinking. Therefore guests are getting less value. Its easier to focus complaints on lowering prices than it is to figure out how Disney could increase the value of your trip.
So I'm with Disney with holding the line on prices, but I think they are falling short on the benefit side of the value equation.
Now, prices for things like soda are somewhat a different issue. A Coke is a Coke, so you can't really offer more value with your Coke than the next guy, so you will be compared strictly on price. So I see a reduction in Coke prices to merely be keeping with the industry trend, and wouldn't expect to see similar drops in ticket or resort prices.
Of course, if Disney continues to reduce the benefit side of the value equation, they will eventually have to reduce the price side further.