Note that you can also do this with the Desktop menu / Add Widget menu. It may be a little quicker.
The next version will have the "Your notes here" removed by default when you first click on the note.
Point taken. What would you think about another which would be as small as a shortcut whose purpose would solely to create new notes?
If you use the + button on an existing widget, the new one will "inherit" the colour from that one.
The next version will have a settings dialog in which you can set these stuff rather easily for any new widget.
My thought is a pop-up message asking if you really want to delete the note. Will this suffice?