Maybe Registry defrag, selecting which drive to defrag in Disk Optimization, in Temp clean-up again selecting which files to delete, or keep (eg. deleting everything, but keeping the Messenger chache files).

Adding the manual scheduling option like the one in NIS (automated ones should be still there, but if the user wants, there's an option to schedule extra scans).

Better history and temporary internet files clean-up for more browsers, like the one in Norton Utilities (supporting more browser).

Plus you can add path to clear when file clean-up is done (eg. unsupported Browser's temp files).