I am going to stick up for Dan and others here. I am certainly not rif-raf, but I grew up with very plain tastes, I have heard the word "pedestrian" to describe my palate. That has changed only in recent years, when I took up cooking in a big way. Prior, when I'd go to a sit-down restaurant, I would want fast-food type items. Burgers, fries, turkey sandwiches, etc. It has nothing to do with someone being rif-raf, it's just people with plain tastes expecting plain food in a restaurant which serves more flavorful and different items.
The best thing a restaurant can do is to stay true to itself. Boma has done that very well, and is still popular. I think the California Grill hasn't changed a lot (just looking at the menu, I've never had a regular sit-down meal there). I do know that Raglan Roads menu changed (one nice steak item was removed, and other changes to the menu), Wolfgang Puck Cafe also removed a beef item (I believe that was a tenderloin). The DDP has inflicted some damage to menus at Disney. And I do miss having meals without the restaurants being so crowded, but that is good business for Disney.
I totally agree that the DDP has sent many guests into finer restaurants that ordinarily would be eating in a food court. I have been one of them. Dining is still not a major culinary experience for me, though more than it once was.
I hope this is legible enough, I'm really tired and have to get up early.