@ abstract:
Yes! HalionSE comes with many outputs! (see > 4:50)
“track background colours”: I think it´s now better for the eyes, the mixer in C6 appears more clearer. I prefer that.
Consider → this is also in Pro Tools/Logic/Nuendo etc. (!) …and in this DAWs the mixer channels are also “free-user-colored”. 
However, we have to live with that, seems so.