yes, to not complicate it I have used the supervisorstrategy class, i.e. the instance that performs the logging.
I was also thinking about this and it's good that you bring it up.
I'm not sure how important that class filter is now, when we provide a way to customize the logging of actor failures, which we didn't had before.
The fine grained logging configuration ticket is related https://www.assembla.com/spaces/akka/tickets/1715