....you can change the background of the track view.
A lot of the threads about missing color customizations was when X1 and X2 came out.
The problem was that the option in preferences to change colors, didn't work.
Cakewak fixed that In X3 so now it works like it is supposed to.
Maybe there is less options than we had in 8.5, but I like the way we now can color tracks and busses
But of course It would be nice to have even more options.