1. I'd like to enter free text, freely placable
2. Also free forms, starting with a sizable rectangle
This way a lot of extra info can be added without too much menu's etc.
1. You can do this in the Stage Plots module of BandHelper. I don't know if I'll add new features to the standalone Stage Plot Maker.
2. What do you mean by "free forms"? Shapes? You could use the Riser, which is resizable, as a rectangle shape, or one of the drums as a circle, but that's not resizable.