While waiting for the EM-1 firmware to be available again I put together a list of features I think might be cool.
1) Motion sequence Effect type
Best would be if it was possible to steal motion sequence slots from other voices (as mentioned elsewhere on this forum).
2) Motion sequence Synth wave type
3) Knob lock when part is switched
To prevent value jump, knob would be locked until it crosses the current parameter value. Display might show the value you aim for.
+1 for instant pattern change option
+1 for pattern chain loop thing
+1 for polymeter