What did your driver measure before (45.5 or 45)? I can tell you I love the 44.5 inch driver right now. I have a lot more confidence and like I posted above, I'm seeing more distance because I'm hitting the sweet spot or closer to it. I didn't think it would make that much of a difference, but it does (for me at least).
By the way, I'm 5'11" and only carry the driver the same distance as you. If you are getting that distance I would not worry about it. Every time I try and gain more distance I mess myself up. I'm working on mechanics like you said.
45" so I am now at a 43". I had the swing weight measured last night and both the driver and 3 wood are at a C3/4. No wonder they feel a little light and sometimes it is tough to feel where the clubhead is at in the backswing. I am thinking about going with a Winn Lite grip on both and then possibly adding the 11g or 14g weight. While it wouldn't get me back to the original swing weight it would get me close. I have noticed that I have been hitting a push/fade more which sounds like it could be the result of such a light swing weight. I really have to work to get the clubhead to turn over. With my hybrid and irons being -1" I would probably just go with the Winn Lite grips in those to try and bring the swing weight back to the original.
When I was fitted for my irons I hit my 6 iron 92/3/7/?/3, 92/3/6/?/3, 92/3/7/?/3 in the shaft optimizer. Couldn't remember the third value but I hit pretty much the same numbers in all three swings. I am thinking the C3/4 is just too light for me.
It's my first night of league tonight so if I struggle I have a new excuse, it's obviously the swing weight.