I still hope someone make something like the Nord Modular G2 key (midi side).
I think the G2 is still the best midi controller ever made. (though the key is so so and there is no sysex support)
-You can build sequencers the way you want : for example you can have 4 sequencers running in parallel with different patterns and each variations (8) can store a different pattern midi cc assignment etc.
You have those 8 rotary encoders for visual feedback.
-Midi modulators : LFO , ENV , Env follower if you want to use audio as a modulator, sequencer of course, random pattern generator etc.
-Morphing between parameters
-Macros : so with one knob, mod wheel etc you can adjust several midi CC at once.
-Key split , no zone limit.
-send multiples program change using foot pedal, knobs etc
I use mine for my live setup so when i change a variation on the G2 it send all the program change for each of my synths at once, I have knobs assign to midi CC to control different synth. I also use sequencer that i control with my foot. Its like a super midi hub for all my gears.
Please someone make a Modular Midi controller !!