InDesign has it, Illustrator should too.
Just a single local change, like font colour, and the text looses its paragraph style. The link might still be active since there is a + shown in the paragraph styles window, but changes in the style does not effect the localy changed text anymore. Maybe this is wanted, but I would love a Remove Local Overrides button like the one in InDesign. It resets all local changes and forces the paragraph style back on the text. Even with multiple textboxes with multiple styles selected.