I would like Inventor to have a Constraint Replacement tool that works like Creo's Edit Reference Table under the Replace command.
That tool lets you select each constraint reference on Component A and pick a replacement constraint reference on Component B. The nice part of this command is that you only have to pick a source and target reference once. If my assembly has 5 constraints to the XY plane on Component A, I only have to say that Component A XY_plane = Component B XY_plane once. Creo will update all constraints that use that XY plane when it replaces Component A with Component B.
See this discussion on the Inventor Forum: http://forums.autodesk.com/t5/inventor-general-discussion/replace-all-error-tell-inventor-x-feat-in-...