It sounds like you would like to treat EventValues as signals — modifying them in real time using various (and switchable) combinations of modules in a signal flow diagram. The key to moving from Capytalk to the domain of signals is the CapytalkToSound module (alternatively, you can paste your EventValue into a Constant in the Value field or use a SoundToGlobalController with Silent switched OFF). One more detail: the range of signals is (-1,1) so for EventValues with wider ranges, such as !KeyNumber, you should divide by 127 in the CapytalkToSound and, wherever you actually use the result in a Frequency field, remember to multiply by 127 and use units of nn.
There's an example in the Kyma Sound Library that might serve as a starting point:
Kyma:Kyma Sound Library:Scripts, constructors, sequencers & composition:
The Sound file called: Compositions without notes.kym
And the Sound is called Improviser KBD-1.
To find it quickly, search the Sound library by Sound name and look for 'Improviser'