First chapter in the Patch Set Notes:
…
Patch sets provide bug fixes only; they do not include new functionality and they do not require certification on the target system.
…
This is so not true 
There is at least one new feature: a new package called DBMS_AUDIT_MGMT.
This should be mainly used with Oracle Audit Vault. But they are some interesting procedures and functions for “normal” auditing too:
- defining of file size and aging from os audit files
- automatic purging from audit records
- moving from audit tables in another tablespace (yes – official supported )
- …
Happy auditing…
