It would be great to have the ability to trigger quantize (and loop, much like it can be with sample loops in Impact XT) sections of the Arrangement Track, for live performance and recording (of the triggers and thus the arrangement, see also https://answers.presonus.com/3658/arranger-track-playlist).
It would be a great complement to the new Atom controller (showing matching color pads for each section) or any MIDI controller (keyboard or pad-based).