I would love to see the addition of at least 1 level of sub-folders. Labels would be my next wish list item after that one. Hopefully the code allows for it and isn't too unwieldy. I would rather have it as-is than unbearable.
You can add a shortcut to your Home Screen to open a specific notebook (see http://feedback.squidnotes.com/knowledgebase/articles/1179331) or to create a new note in a specific notebook (see http://feedback.squidnotes.com/knowledgebase/articles/1179328).
It does not appear to be possible to create a widget that allows for taking handwritten notes directly on the Home Screen (due to the fact that you need to be able to swipe left/right to get to different pages on your Home Screen). Please vote here if you’re interested in a widget that shows a particular note on your Home Screen (and allows you to open it quickly to edit it).
And the addition of having it added to the galaxy note's "pen window" options. I'm not sure if that would be the Papyrus team or something for Samsung to change.
I've had this same thought a few times. I very regularly use at least two different color pens on a daily basis.
Changed this feature request to just be for rotating items. If you also need support for grouping, please vote here: http://feedback.squidnotes.com/forums/177239-general/suggestions/33430924-group-objects
That would be an excellent option. Personally I don't foresee needing the option to mirror writing notes, but it would be extremely handy for sketching/drawing. The rotate/scale would be very useful. I've had to go back a few times and re-sketch something a different way because I wanted it to rotate it or make it bigger/smaller.