When in clippings and I press the "notes" button I then have to mouse to the notes entry box and click to get the focus there to start writing a note. That seems like extra mouseketeering.
suggestion : when the notes button is clicked auto focus in the notes entry box. I assume it would be best to go to the end of whatever text is there, if any.
However, I suppose if there is tons of text already in the notes jumping to the end might not suit everyone.