I honestly didn't feel much of a difference between a new driver and my current one, which was disappointing. We had the screen on the side showing where my shots were going, and when I "missed" with my the new one, he kept saying how far they were still going and not too far from centerline.
Totally agree on distance not being an issue -- I feel like 175 with my 7 works great with me. And you are right, my biggest cost of strokes is my putting and I would say my "mid game".
Between 80-130 yards I am super comfortable -I use my 56 degree or my P-Wedge. I have a huge issue when I get around 50 yards out, as I have to use my 56-degree and adjust power, which I am not great at. I feel like a new wedge in the bag would help a ton.
I, for the life of me, cannot use my 6-iron. It never leaves the bag. I have a 5-hyrbid that I can hit pretty constantly that gives me 200 yards. Anything above 200 yards I am pretty much exclusively using that, since I cannot reliably use my 3-wood either.