WARNING... Don't just go and randomly have your shaft cut down to size. 46" stiff - cut down to say 44" would easily be a change in swing weight - and the shaft will be much stiffer than advertised from the OEM @ 46" when cut down to 44".
My recommendation... Get your numbers with the new 46" stiff shaft. Check the following:
1.) Ball speed
2.) Launch Angle
Report back what you have... And then from there we can provide input on the next steps. I play with a 46" shaft too - and hit over 60% of my fairways. And my swing speed is in the low to mid 100's. So I wouldn't immediately think that you can't play with a 46" shaft.
Also, I use a Bugle Tee which has a built in tee setter... 3 1/4". This ensures my tee height is set properly with every drive.
I bought the twin pack which came with one 2 3/4" and one 3 1/4" tee. I only use the 3 1/4" tee... And I've played over 100 rounds with the tee and it is in perfect condition - minus being a little dirty looking (my tee's are white). I'm not saying you need to have a Bugle Tee - but I'd get a longer tee - and ensure you are hitting it higher on the face to get the Spin numbers down as discussed earlier in the thread.
Your launch with your swing speed should be in the 11 to 14 range. The more you swing up - the more vertical launch you will get.... So the ball with fly higher - but you will maximize your distance.
Up meaning...An ascending blow with the driver - while trying to have a slightly forward shaft lean (flat left wrist) at impact.
Play around with your address posture... Here is a good reference from a student who is working with Dana Dahlquist (an instructor who is well respected and teaches a swing pattern based on a centered pivot):
Notice how the student with his driver tees the ball forward - near his big toe on his lead foot. His head is centered - which places it well behind the ball. This type of setup will promote an ascending blow with the driver. And then from there, experiment with your tee height - and monitor the impact on the face. Getting blows to regularly be in the quadrant #1 will really maximize your distance - and minimize your spin number which was killing your distance.