Yeah the mixer view is a bit redundant. It's traditional and probably why most DAWs have it as a separate view but I think it's a waste to bother with it. Sure it may be slightly tidier and thus a bit more convenient for, well.... for mixing but I've done just fine using the track arrangement setup.
I suppose Abelton has the right idea with the session view I just don't like having to use the mouse to elongate the channels.
Anyhow, yeah....mixer views for traditionalists. Nothing important.