Actually I am using the P12 Desktop for live performance as well as in the studio. I’m planning on using a BCR2000 just in case I decide I need to make lots of adjustments live although the unit is just about perfect as it is.
Regarding playlists, it would seem that most of the software work is done and could be ported to the P12 Desktop. By selecting some combination of buttons to put the unit in playlist mode, it shouldn’t be a large task to add playlist capability. But it may not be cost effective (i.e. will it sell more modules). It’s a nice feature but certainly isn't a show stopper for me.