Note this feedback comes from discussions with over 200 DJ's I have interacted with over the last 15 years using Traktor
Idea: Have taller sliders for Faders, Tempo adjust, etc..
Usecase: Small sliders making it difficult for accurate adjustments
Description: due to the deck area having a particular height it limits the range of the sliders in the UI, having larger (taller) sliders for controls would make it more accurate for things like tempo adjust with the mouse or trackpad