I’m all for the sampler stuff, that’s for sure, especially the loop-point automation. @Achenar is REALLY close to it as is @Raul.
I’d like to know more about what you mean by the variable pattern lengths in the arranger - do you mean the patterns in a horizontal row, so one could make polyrhythmic patterns? Then yeah, that does makes sense. Otherwise, it’s very easy to make one row/pattern 64 steps and the row/pattern below it 16 steps. There IS a way to polyrhythmic patterns, read here: Phrases, Polyrhythm Example. What makes it effective is the “Glide” command (0GXX) or (GX). That’s the trick behind it, and it is very effective. Not only for long samples to just keep looping, but for patterns as well. That being said, it sure would be cool to be able to just do it right in the sequencer area. Make one track in the pattern 16 notes and the track right next to it 13 notes. Using phrases is the current way to do this.