Seriously, why would you care what anyone other than a pro says about your equipment? It sounds like you are hitting these clubs well, and quite frankly, they are some of the easiest and most effective golf clubs out there. Unless there is some issue with your ball flight that you have not mentioned, I would not do anything with the stock shafts with the exception of seeing a good clubfitter and being checked for length, loft, and lie. There is no reason why can't drop another 10 strokes off your game with your current sticks.