RE: Chains that have gone DOWNHILL........
Burger King. In the 90's I loved their Big King and chicken tenders. KFC used to be more flavorful, its missing black pepper and is just greasy, bland and tiny But "their" Nashville hot chicken is really good.
Pizza Hut. If they would go back and do everything they did in the 80's, I'd be happy. But no, they decided that killing quality for the core products is cool as long as they can come up with MEGA XXXTREME chicken nuggetz n ketchup pizza to boost sales.
Wendy's is there too. I used to be okay paying a bit more because they were better. But now they price themselves into fast casual without fast casual quality.
Little Caesar's. The round is better than a frozen pizza and good for kids, Their square and italian cheesy bread more than make up for it, and are probably better than the rest of the pizza chains. I used to hate Domino's with a passion, but the last few times i ordered from them, it's been really good.
Super long story short, all of the chains need to make their product taste how it was that made them popular.