What a coincidence. I used MadTracker today after ages (because of its ReWire support ofcourse). Being able to have different views simultaneously on screen would be helpful, and IMHO renoise GUI has this potential itself. Even there are ways to have a more flexible GUI in renoise for now (without the need for major changes). I suggested some changes here before:
http://www.renoise.com/board/index.php?sho…c=13434&hl=