I to just made master, and made the mistake of buying the master irons, stick with the rapture pros for now, you are not losing much distance and the meter is far slower. You are gonna give up some other attributes from the master irons, but for now, for playability keep the rapture pro irons.
I played my first 9 as a master and actually shot what I had been shooting, so its not too much different yet, havent played black in ranked, just practice so far. Think of it like you are a hack again, takes time and practice, at least by this point your short game should still be really good, and you get how the greens work
To me, Master is the only lever I want to play at, the game is more challenging and plays more like real golf in my opinion, just gonna hav to practice a lot before going back to playing match challenges and ready-go's.