A lot more complex too …
Anyway, create an issue on the issue tracker and let’s see if someday it gets implemented
I don’t know if flashing is such a good idea. The UI should not distract and you can start a battle for attention with each feature becoming more intrusive as it says, “Look at me”!
I have raised a github feature request for change in colour configuration.
I have also raised github feature request requesting recall of previously configured X-Y controller.
I think flashing has a useful meaning. i.e. Something needs doing things like allocating CC to a control and such like. @jofemodo says this is involved but assuming a case of a user appearing in front of a Zynth left in CC allocation mode for example would probably not realise that a question mark represents this state. Flashing would seem more informative, with a timeout that clears the state down after a preset length.