Re: Fast 6 wt or slower 7 wt?
gt, rod weight/action is such a personal thing that I think it might be worth BlueDun's time to try a heavier line. It might not work, but if it does, the solution is rather inexpensive.
Personally, I've played around with overlining and have had mixed results:
Scott A3 3wt. w/ a 3wt line: the rod would work ok with dries & hopper/dropper setups. As soon as I added a bit of weight, the rod seemed to just collapse. A knowledgeable shop owner suggested I overline it and it just didn't work.
SAGE Z-axis 3 wt. An amazing rod w/ a 3wt line but it always takes me a while to get used to it, especially after using my TXL ooo or Winston IIt 3wt....
So, I loaded it up with a SA GPX 3wt line that supposedly is a 3.5wt line and I think it takes me less time to get used to the z-axis.
Anyway, the bottom line is that all that "feel" stuff is a personal manner so I would say experiment (more than once) before making a decision such as getting rid of a potentially perfectly fine rod.