I would like the Oracle Database to report the number of rows affected once a ROLLBACK/COMMIT statement occurs. This would be very consistent with the reporting of other statements that get executed and be very helpful to the end-user.
And since it's possible that everybody may not want this feature all the time it could be updated as optional display of output, for instance: ROLLBACK ..... [WITH DETAILS]; or maybe COMMIT [DETAILS | VERBOSE]. Something along those lines.