My most lamented change was Nissin’s Cup Noodles soup. The chicken used to be in freeze-dried little cubes. I used to take all of them out and eat them without cooking the soup. 
Then they “improved” it by adding really awful-tasting freeze-dried chicken chunks that looked a bit more “natural,” if you could imagine such a thing.
Now they have no chicken, but to make up for it, they took out the little damn green onions.
Then, there was that one time I opened a new cup, only to find that the cubed chicken was back. When I couldn’t find anymore like that, I realized that it was only because I had a vintage case… :eek: