I would argue that you should indeed hoist your data to the highest point, but definitely not your logic. Otherwise you end up with a big mega-component at the top level that contains fragments of business logic for many unrelated features, and coupling your business logic to your view component hierarchy is not a good idea. Changing your page layout should never break your application. I don't advocate any particular solution to this problem but I do believe that you need some kind of architecture that allows you to decouple your UI code from your application code.
