There is a way to adjust the poly after touch so that it only engages once you reach a certain point. If you open the editor and select 'Tables' from the hardware drop down menu it will bring up the table editor, where you can define 2 custom tables to be used.
Then you can map pressure to poly aftertouch in the keyboard layer and select the custom table for the curve of poly aftertouch.
As far as realtime feedback goes we don't have anything built into the editor or the board to give accurate realtime feedback. There is a great utility called Midi Monitor
that will give you tons of information on what your QuNExus is spitting out.