When creating a new aux using 'send to new track', the output of the aux should default to the same output as the source track. This way, if you have already bussed your drums, vocals etc and go to add a new buss for reverb, parallel compression etc, it's already going to the right place. At the moment you have to remember to set its output yourself - I often forget and then wonder why strange things are happening later.
Idea No. 263