What's interesting to me is that the Electronic Brain video actually shows off a couple of flaws in the matrix and step sequencer that have annoyed me:
1) The matrix often cuts off the beginning of loops when first triggered, especially MIDI/step sequences. You can see when he first triggers the drum sequence, the first bass and snare hit don't sound properly. (If you record to transport and then play back from the transport, it plays ok, but this kills most of the usability of the matrix view for live performance imo).
2) Adding new sounds to the step sequencer is really cumbersome -- you can see in the video, the automatically added instruments didn't include the one he wanted, and he had to know the exact midi note number to put it in. This gets annoying really fast, especially if using something like a Dimension Pro percussion set that doesn't have names for the notes. A "midi learn" function would be ideal (just hit the note you want on your keyboard), plus a drop down list so you don't have to scroll around in a bunch of numbers.
And yes I've submitted bug reports/feature requests for both of these.