This release introduced a totally new rate-limiting system for all modules as well as much better "last message repeated n times" handling. For details, please see Rainer’s blog at
Besides this feature, the version also includes enhancements for omelasticsearch as well as input batching support for imudp (which should provide some performance boost on very busy systems). Also, action-like statements (call, stop, …) are now supported in action lists. Of course, there are also some bugfixes, many imported from v6 and v7.2.
As always, feedback is appreciated.