First let me tell you I love your app!
I have the iPhone, and it works great with it. Looks super cool graphicaly also. The iphone screen is very small, so im considering geting an ipad. However, ive used Nano studio a lot lately, and while the note sequencer is a bit to tiny, the rest actually works rather well. Split screens help out a lot. Some examples: keyboard + 2 XY pads, keyboard plus synth parameters, and so on. Im also using Native Kontrol for the APC 40. They also have some briliant ideas on the interface. I recomend checking them out! The only problem is that you have to remember all the functions, as the APC dont have text feedback. And while Native Kontrol perhaps have the best ideas ive seen so far, its still a big set back without text feedback. With Native Kontrol you can have 2 device controls, or 1 device + 8 single track sends, mixer, and sequencer/drum pads/keyboard/clip triggs at the same time. Btw, the ipad has a lot more screen space. A 3 octave wide keyboard would be sweet! Nano studio fits 2 octaves wide on the iphone, and it actually works. In adition they have a pitch wheel, mod wheel, and 2 xy pads on the same tiny iphone screen space. Remarkably, its actually easy to use.
On the iPad theres a lot more space then the iPhone. it would be great if Livecontrol had splits like this. Eksamples: mixer + device control. Device + track control, 8 sends for each track above mixer (check native kontrol for apc40 videos on their home page) Any combination actually would be great. Maybe a split screen system where one could scroll throuh the upper and the lower section, I dont know.
I would also love to see one day an interface that mimics the ableton interface! With open/close window buttons in the corners, and scroll bars on the sides, etc. A minimal touch version sort of, where one could operate the live gui as suposed, but remotely with touch. I find it strange that the APC 40 design did not mirror the live gui better. But then again we now got touch screens!