Setlist, no brainer, glad that's on its way.
Ableton Link would be ace. As would some kind of asio routing/driver to allow linking audio to another daw, or rewire functionality?
Also +1 for the ability to put lyrics/notes into the flow so they pop up as the arrangement progresses. Sure, nothing beats knowing the song backwards, but sometimes you decide to add something to the set at short notice, and some visual cues are really useful. Not having to have charts in a seperate program/device would be a huge stramline feature.
I'm about ready to put down some spondoolees and port my entire set into ALK2, but that setlist feature is kind of the clincher. Having to hit file and navigate around my hard drive between numbers is a real buzz kill, espeically as a solo performer. And, no, I can't have the whole set in one project, especially without markers and a marker list to navigate around. I use looping to augment live performance. The set isn't sequenced and identiacal every night, and i swap things in or out depending on the audience. The ability to be spontaneous in material selection is more important to me even that the ability to be spontaneous with arrangement within numbers,