Although I wouldn't buy one at full price, I do have some non expiring hoppers at Disney. I definitely find more value at Disney since I can come early and leave much later. I think I did every major ride at all 4 parks besides DMT and saw 5 shows in one day.
On another note these prices are going up like they are college tuition. I know they want to punish you for going only one day but a power pass (which I have) is less than double what a one day park to park costs. A season pass to pretty much any non Disney park in america is cheaper too. I just wonder where it stops. I would have thought the competition would have kept prices in check a bit better. In NYC, one of the most expensive places in America, I recently got a decent hotel and saw a show for about $150.