For me I think it doesn't matter how many buttons there are as long as it doesn't take away from the game. If that makes any sense at all? I feel like a lot of games let their buttons take over the game and draw far too much attention. I like the buttons to be there but not dominate the screen. That's what makes a controller and a tv so great is that you forget about the controller and just immerse yourself in the game. So if your game is accomplishing that while having twenty buttons on screen, GREAT!
future Swiping and finger gestures are cool but sometimes annoying. Onscreen controls feel more natural. @krehol games dont give up the dream. I believe if apple make side-out controlpad.