If i tip my driver shaft, will it decrease the launch angle and the spin?
Tipping may lower launch and spin, depending upon the shaft itself, and how much you will tip it. If the shaft is high launch and mid spin, by design, you may need to look for another shaft rather than try to tip yours to be something it wasn't designed to be.
I was contemplating tipping a diamana whiteboard x flex which already is a low launch/spin shaft. My launch is ok but i have too much spin even with a pro v1x with that shaft in my 910 d2 set at 8.75 degrees.