Right now i'd settle for some additions to the chord list. I seem to remember Peter saying it wasn't a hard thing to do but seeing as how that was several years ago, and there's been nothing new since, you could have fooled me!

here's a few suggestions for starters

susMaj7 (really need this one!)
maj7 add 6
maj7 add4
Maj7#9
mMaj7b5
mMaj9
mMaj7#5
7 add6
7 add4

Also better support for 13th chords other than a few specialized voicings and ones on macro notes.
How the program is supposed to add a 13th when there isnt an 'A' in the voicing is a mystery but thats effectively what it has to be able to do. Having the 'A' in there as standard in every pattern would affect every chord played and that wouldnt be desirable either. The same problem exists with #11 voicings. When do you ever get the 5th along with the #11 as you probably should.?

Regards

Alan