Some routable send could be useful:
1) to make subgroup, to control level (ie drums, pads & keyboard, chorus…)
2) to send a different mix into USB outs (I wish to record a simple stereo track with some windows app that see USB output/out 1-6, that are already set as personal monitors…)
For each channel: additional Send [7-8, 9-10,…)
Each additional Send: level, assigned output [USB 1-2, OUT 1-2, …)