Right now data bindings default to a certain data model. E.g. page data container, form data container, reusable component data, etc. It would be interesting if there was an area in the right bar of the logic section that clearly denoted a group of elements that had data bindings and allowed you to choose which data model you wanted elements in that group to bind to.
For instance, in a Reusable Component you could set all the data bindings to Page Data, which would then allow you to use the parent data model more effectively without having to use logic.
Just a thought, and I know there may be a variety of counter arguments to this one.