Kx drivers, to my experience, work better than asio4all in a SB live I borrowed from a friend.
But they are far more cryptic in the mixer section etc, at least for me. Even the left-right out is swapped initially for some reason.

I don't have the ambition to ever play live, or having such an expanded setup like you do, or anything, but I realised that the sounds of Hyper Canvas driven by my old keyboard, get me "sparked up" enough to play. Even the styles I use so many years now sound better through these sounds, after I tweak the levels a little in Hyper Canvas.