Ability to anchor graphics across spreads
Because with accessibility it is important to anchor graphics, sometimes when the graphic reference is on the previous spread or the next spread, it is necessary to anchor to another spread when the graphic doesn't fit. When you do this, indesign will automatically move the graphic to another page. You should have the ability to anchor something across spreads.
Especially common problem in long documents, such as reports, where the chart graphic won't fit on the page where it's referenced in the body text.
We need to be able to anchor graphics (and groups, and text frames) to a spread that is before/after the one where they are visible.