Thanks for the updates Lucid. For anyone interested, Here is a workaround to reimport Spriter files. It's still a little painful, but not as bad as recreating everything.
1. Delete the scml file
2. Delete the on initialized events
3. Drag in the new scml file
4. Select all events referring to the old Spriter object, right click and replace object with the new one. Repeat for the actions.
5. Delete all of the old Spriter assets.