Mick, i understand why you say that a track and a send track are associated with each other. But what should happen to the send track if you have several tracks using it and then rearrange your tracks?
Also, when i add a send track by using the '+track' button it is dropped at the bottom (main view) and all the way to the right (in mixer view). And that makes sense - how would Mixcraft know in advance the track(s) i wish to use it for?
(If you right click a track and insert a send track, it will indeed be inserted above it/to the left. But that's for every kind of track, except video tracks.)
But i do think the mixer would profit from a new design, including visual aids to see the routing. I also spend a lot of my time in the mixer just finding out where the track is that i'm working on. If my selected track would always be the same (customizable) color for instance, regardless of its type, that would already help.
Other stuff that comes to my mind when in the mixer: some type of visual border between the tracks; customize the number of visible sends; show/hide/lock buttons and faders and other information per track, combined with scalable tracks (width); linking faders; grouping (move and customize tracks as a group); create a yellow note on a track; a picture of a happy cat, etc.