When using a slightly different setlist for several concerts, copying a setlist would be a nice feature.
So you could create the "basis", and copy and adapt it for the other concerts.
Although not very intuitive, you can already do this.
Open the setlist you want to use as the starting point and then select "create setlist from songs" (you need to be out of performance mode to see this menu). Give it a name and it will copy all the songs in the open setlist to the newly named one. Then modify the latter as required.
You can also go to the Setlists tab, long press a setlist and select "Copy" at the top of the screen.
Thanks, I could copy one via the "group copy" function (after long-press a setlist in the setlist-tab).