Allow longer songs.
I like to practice using iRealPro, and even use it performing, but find myself looking for other software because the song length limit in iRealPro is so severe.
For example, if I'm going to change key, there is no way to do that because there is no room to repeat the chords in another key.
For some other songs that don't fit AABA, there may simply be too many parts of the songs which aren't repetitions of the same chord sequences.
I realize iRealPro is for jazz standards, but it could be dramatically more flexible just by removing this silly limit on song length.