I'm tour master now, almost legend, but I don't get your point. I didn't notice any changes when I became master actually I didn't feel much difference, but when I became tour master the only difference was that the greens are always turny greens.
About clubs you said. If you already have your set and you are used to them, check the features they have and try to find another one with the benefits you want. For example: I want to buy the R11 irons when I'll be level 90, and I already checked that the meter speed is fast, even like that I want them because the precision and spin is unique, what I'm doing? I bought the Ping i15 because the meter speed is the same, just to be practicing with them before get the R11 and don't have a surprise about the speed.
Concluding, choose a club is always based on your game, I'm sure the clubs you have you like them and if you want to change you are going to go for something close to what you have now. I'm sorry to say this but after level 80 it's just fast stuff.