I just feel like there is too much emphasis put on shaft flex and I don't feel like it is anywhere close to as important as most people think. I give the weight and the torque of the shaft more credence than shaft flex. The weight of the club and the resistance to twisting or the torque mean much more to how the club is delivered than shaft flex. Kickpoint is also mostly irrelevant.
There really no such thing as a low launch or high launch shaft because the shaft doesn't have loft on it and no shaft is doing too much before impact. The club head, it's loft, CoG location, and how centered the strike is has way more influence on the ball's flight than the shaft ever will. Any club can be hit high or low depending on the impact conditions provided.
As others have probably already said, check your swing first and if you are getting a centered strike, then begin to examine the club and see if you can benefit from a change.