I am always curious what more there will come in software and because I am very happy with GPO, the same here!
So in case the GPO creators are working on something, what could this be? Personal, I would love to see real staccato samples for the woodwinds, and maybe something that would give the Stereo Stage option a better effect, because I don't feel the difference so much when using it and turned it off completely after some experimentation. It would be great to have a way to put the instruments in an easier way on stage, left/right, front/back.
But as I said, I am very happy with GPO and have good very good results with only little effort from my side!