at least a way to differenciate tracks sent to the master with tracks sent elsewhere. just like in ableton live.
and why not going further : a slight color difference between sent and sidechained tracks. and grayed vumeters for tracks sent nowhere.
of course since a track can be sent to the master, sent elsewhere and sidechained elsewhere, the vumeter color would be the most "important" one (master > sent elsewhere > sidechained > not sent at all)
I use track routings a lot and sometimes i'm sometimes quite lost when I check the vumeters. never sure if a track is sent to the master or not without checking routings. having it displayed this way would remove any doubt.