For my family, it is not a perceived food quality issue. The quality is awful compared to the way dining was before they started pushing the dining plan and offering
free dining so much. Back then, every restaurant had original menus with quality food on them. Also, while the prices were higher than offsite, they were not ridiculously inflated to try to give people on the dining plan a perceived value or savings they could add up. We used to actually plan to eat at our "favorite" restaurants each trip and try others looking for new favorites. Oh how things have changed, we just came back from a 16 day trip where I had TS reservations every night, after bad quality food at 3 restaurants in a row, I canceled the rest of the reservations and we ate off site. Not only did we have great meals off site, we saved a ton of money too.
For long time and frequent visitors the quality cutbacks all the way around are not perceived, they are the reality we have been served by Disney. Don't get me wrong, we still love Disney but we don't spend money on food anymore, we don't spend money on the generic merchandise anymore and we tend to branch out and go to other non-Disney places more than we used to.