I'm really enjoying Arturia Pigments. Among other things, its system for visualizing and managing modulations works very well for me.
I'd love to see a phase knob for each function, identical to those on the LFOs.That would open up many additional sound design possibilities.
Imagine, for example, being able to set two identical or nearly-identical functions, modulating differently-panned targets, slightly out of phase with each other. Then, you modulate the phases together or independently over time to create some crazy stereo syncopation effects. Or maybe you start with the functions aligned, and then make them jump in and out of phase with each other. Fun stuff!