Nedim,
If i understand correctly the KARMA version for Open Labs will have a fill in function (triggered by drum pad 17)
I could be wtong to as my KARMA knowledge solely comes from reading about it and watching video's.....
You also said that there will be a KARMA for the Motif XS ? I haven't read anything about it.
Tough if i was yamaha, i certainly would get a license to build a version of KARMA into my Synthworkstations.