Rotating the logs daily makes it difficult to generate a weekly trend review, but the logs get to big to be rotated monthly. The ability to rotate them weekly would be great.
Probably will be implemented new macro variable %WW% (week number). If you will use this macro in name of the log file, HM will create new log file every week.
About possibility to define any period to change log (e.g. change log every 3 days): I don't think it will be implemented.