1) Yes. Another "clean way" could be to get the possibility to have 2, maybe more, options for songs names, with the first as the reference. The titles could then appears each on his line. Maybe easier because tonality isn't done for that and use 2 colors, one unselected and the other when selected.
2) Yes, that's what I'm doing. The way I'm using it is to write what I have to work on a song, and because it could evolve, that's convenient to do it directly on rehearsal.