Hi,
This is my first post. I have a rather long musical background with several years pause a few years ago, however. I'm not experienced in sequencing, but did answer no, because I think that sequensing should be able to be done well externally, either with a software or hardware, and, I do have a couple of choises in my home studio for that.
In any case, to tell my sincere opinion, 16 steps (or, even 64) sequencers are producing monotonic, if not boring music. KARMA is much better, but although often too lacking any melodic idea, i.e. sounding like meaningless random plim, plom, back and forth.
However, Stephen Kay has several times mentioned that he may in the future produce a General KARMA II box or software that can be attached to any MIDI synth. It could be wise to ask him directly, if this will happen soon. In KARMA 2 you can not only 'randomize' notes and parameters, but sounds of instruments or waves.
Wouldn't it be interesting, if in a high-resolution X/Y pad you could assign a different instrument or waveform or combinations of several waveforms in each x/y position, and, then play with them in real-time! If the synth would allow the path of your finger(s) to be recorded, you could make (very long) sequences with this technique! Does this sound feasible? You ofcourse would (maybe later) need a software to help you to develop and assign good x/y instrument/wave tables to the XY pad matrix.
Secondly, a buttonboard similar to the following would be quite useful, when playing chords one-handed or producing huge chords with both hands, or playing lightning fast solos.
http://www.c-thru-music.com/cgi/?page=layout
In addition, the buttons could be here too assignable to any MIDI commands/sequences/waves, in addition to just MIDI notes i.e. pitches. It doesn't need to be this many buttons, and 1/2 would do quite fine. Same fingering (i.e., mirrored keys) would be the best for both hands to make the learning curve faster!
http://www.c-thru-music.com/cgi/?page=prod_axis-64
If there are no room, I would even replace part of the long piano keyboard with this type of buttons. By the way, a chromatic accordion buttonboard similar to Roland MIDI accordion, is as well faster and better for single (or, double) hand(s) playing than a piano keyboard. It is a second possibility. Again, I don't mean to be rude, but in my opinion the large piano keyboard is nothing but optimal in size and construction. And, I think it would need to be improved, if not gradually replaced. I'm sorry if these ideas are too 'wild', but this is just how I feel (as a Ztarist).
Best wishes for the development of new hardware instrument with great voice and controls!
Cheers,
Tiitu.
PS. I did send John my pre-order today.