I, too, wondered this past trip if servers were tired of free dining. We had the best service I've had In a couple trips, but we were TIW... And that gives them a guaranteed tip. So, while in the past I thought sometimes they didn't work for that tip, this time, we had great service. Maybe it was just the luck of the draw.
I've only been a regular since 2010, but even I think TS quality has decreased. We've still had some good meals, but definitely more just okay food. My normal traveling partner refused to go to our last couple of reservations because his experiences had been blah earlier in the week.
We still love Liberty Tree for lunch, for example. Pot roast was as yummy as ever and he really liked his veggie burger. And the server we had there, he was awesome. But both of us thought the food at Grand Floridian Cafe was not as good this time. I do think American palates have gotten more sophisticated, but I don't think Disney is doing well at catering to that crowd. They seem to be behind the times, serving too much to "the American picky, expecting bland food eater." And I think their methods for doling out QS food is behind the times.
They need a food facelift across the entire resort. Yes, there are still some good meals to be had, but I think more Americans expect more now. The food served at food booths during F&W now is NORMAL choices we see everyday, not exotic choices, and their regular food options haven't caught up.
Oh, we were there last week, btw.