Per setting by endpoint there exists a change history, but this does not appear at a baseline level. Alerts can notify about command center actions or settings being updated but there is no process to see a history of command center/baseline/tenant changes made.
Current workaround for implementing rollback change-by-change at the baseline level involves copying the baseline, making any necessary changes to it, and then reinitializing endpoints to that new baseline. Otherwise rollback can only be done to the pre-Senteon level. (request mentioned by Josh Copeland)