I think it would be useful if there was an easy way to see which rackspaces are in use in a current setlist.
Sometimes I reuse previous Gig files with eg 15 rackspaces and would like to clean it all up before a concert. I always have to go through my songs manually to see which rackspaces I actually ended up using.
Alternativly a “Delete unused rackspaces” function would do the trick.