I am surprised to see nothing coming from smaller manufacturers. A lot of little manufacturers are currently producing sequencers. There's so many of those, genoqs, sequentix, signal arts, future retro, doepfer, manikin as well as all other synths with built in sequencers (jomox drum machines, elektron, spectralis...)
Seems someone amongst those could produce a sweet patchbay. The um-880 looked just like the roland a-880...
A thru box sometimes does not cut it. I have a few devices with crappy midi implementation so i have to prevent some devices from receiving some stuff, otherwise they act weirdly...
I have to agree that the motu interface isn't the easiest, at least from the little bits i've seen...