I haven't had a "great" meal in Disney in years. 2009 we did have some "great" meals, that didn't seem like theme park food. This last year, I would have rather gone for a burger anywhere then most of the overpriced barely decent meals we received. I have not yet done Uni, but we are booked at Mythos, because I heard from multiple sources it was great.
Mind you, I've never done "signature" dining at Disney, because I have no desire to leave the parks and get fancy, it would take away park time. But I've eaten all over the parks, and very rarely have I ever been "impressed" with the food there. Most of it seems to be below average, including the burgers!
As a kid, growing up, I used to dream about Disney burgers! they used to be wonderful! The 70's and 80's - for some reason, had excellent burgers.
Now, we've done character meals, all the EPCOT restaurants, etc. Not that impressed so far.