A friend of mine worked in the parks about 6 years ago. He told me how a high up chef of the parks at the time decided to improve the park corndog.
The Disneyland Corndog is actually a sysco hotdog (aka the cheapest hotdog money can buy), and bisquick pancake batter.
The chef actually did a lot of taste testing and wanted to make a higher quality product. This meant high quality meat and batter made from scratch. After months of work, the new high quality corndog with better meat and batter debuts.
In an incredibly short amount of time, the park got so many complaints about "ruining the corndog", that they went back to the cheap ingredients.
It wouldn't surprise me if Disneyland in the future trying to switch to handmade churros would result in similar backlash.