Not sure if iZotope monitor a thread like this, but they don't seem to have a forum or similar on their site for feedback or feature requests, so thought I'd put it out here:
I've wanted for a while some sort of control surface for the iZotope range of mixing products, but the given that there are so many controls for something like Neutron, it makes it quite a difficult task to create a physical one, not to mention that even if I went down that path, it would be obsolete once the next release comes out.
In an ideal world, I'd love to see an iPad app that can connect to and control these products, so if you were to use a mix of Neutron, Relay, Nectar and Ozone over the session, you would be able to control the entire mix through iPad as a touchable control surface, including the Visual Mixer and Tonal Balance Control. That would be awesome! It could then be updated with each release by iZotope to keep it current.
I've considered creating something in Lemur also, but I don't feel that it is ultimately capable of doing it justice and a native app would be way better.