I have found that it is easy enough to use the spreadsheet under Teaching Manager > Import > Import sets to create sets in bulk for multiple students, even for all the students in the school. However, there is no easy way to "undo" this. It would be great if there was an option to delete all current sets and to replace with new sets.
Curriculum Manager will be announced for release in Early Autumn. Cm unlike TM will have historical cycles and when you rollover you can chose to omit sets from the future Cycle. Historic cycles will be saved and referenceable in the UI