I advise you keep your driver the way it is!
Oh - welcome rama.
I'm not sure what the problem is. You've got great distance considering your SS. Running your numbers on a trajectory model, yes, you must hit it pretty high.
What are you looking to do? Add distance? Bring your ball flight down? Something else entirely?
You've got an ultralite shaft in it at 55g. A 67g shaft is heavier, but not considered heavy in the world of drivers (~80g or more is heavy).
Let me know what you're trying to achieve, and I'll chime in with more.