That seems a very interesting proposal, we like your ideas!
But before we make a decision, please let us know more details of that.
I assume you are going to use the stick of Cyborg V.1 to replace Left stick of DS4,
and to use hat switch/POV switch as the right stick of DS4,
and the extra buttons will be assigned as those on the controller.
Is that right?
Based on this assumption, I do think you will need a lots of skill to operate this flight stick for FPS games.