I looked at the menu outside of the Blue Bayou and found that they did not list prices for their menu. I think with the recent price hike, it is only good customer service to list what is being charged. In the real world, restaurants commonly list their regular menu outside to allow people to see what is offered at what price. Prices are not hidden or left off.
I just think that since other Disneyland restaurants list prices, it is only courteous to do so for the Blue Bayou.