Midi notes and macros

Hello! I have used Hog 4 for awhile but I am new to using the midi functionality of this software. The band that I am working for wants full automation that is synced with their tracks. They will use neither LTC nor MTC. So I have landed on midi notes. Now I have programmed all my cues into cuelists but they want to be able to not just go through the list linearly. They want to be able to do a spontaneous chorus or bridge at the end of their song and they want the lights to jump back with them. They also are going to change up the set list every night so i would want the songs not to be tied to a master. Should I use comment macros, or just tell them that it is not possible. Please give me as much help as you can give me.
Thank you in advance!