I recently discovered that when starting up or anytime during a C+D charge attack you can cancel it into any special or super move so long as you continue to hold down C or D during the input.
I found it worked out pretty well with shen woo, charging C+D, switching to charging qcf+C, mixing up cancelling it out with D and letting it fly. charging C+D and releasing qcf+A or qcf+B, or just releasing C+D.
hold C+D, release either punch or kick depending on the type of special/super you’re using, and then input the command with the other button still held down. if you use jab or short, you don’t even have to release C+D.
example: with shen woo, you hold CD, release C, input qcf+C and the CD is cancelled into qcf+C.