I don’t quite like the way the sample list only displays 3 lines. It’s frustrating to manage larger drum kits / zone sets.
If the “divider line” between instrument and sample lists, and the top frame wer resizable, you could adjust how much and what info is important in your current context. Furthermore, if these resizings were stored in view snapshots, it’d make for easy switching (e.g sample editing/mapping and pattern editing).