Steve,
It is a known deficiency in Cisco Express that there is not a daily interval report.
There are also no standard “day of week” interval reports that assist in “trending” projects.
The newest versions of Cisco Express have an option where you can pay more to have your own report design capabilities, but I understand it is expensive and complicated.
Our reporting system does all that in standard reporting. Maybe a better option for you. If you are interested in knowing more about our solution to the Cisco UCCX, please contact me. Ron Reif / SMSI / Unify Reporting