I dunno. Sometimes people don’t even bother to try the simple things…
One approach could be to take a snapshot of all the values of plugin_properties. Then, the user clicks a Lua button that says [Go]. Then, when you move a knob one of the plugin_properties will have changed and all the others would not have changed. With that data, you can easily conclude that “Param365” was turned.
Problem: Sometimes you have an oscillator that constantly shifts values. You could compensate for this by taking a dozen snapshots when the user presses [Go]. Then you see: analyzing. Then: ready. Then: User moves a knob. Anything that was already changing is disregarded from the data set.
An so on.