Yes and no.
No, because when I initially got my last cue - the more important part was the Ultimate Weapon shaft - it took me about 2 months to adjust. It was just too thin initially. So I switched back and forth between this 11.65mm and the 12.5 mm The Pro.
After about 6 months I definitely played better with the 11.65mm than I played with the fatter shafts BEFORE. I know for a fact that it was my tenacity and the fun I had playing with a new cue that made me practice a lot more. Now I keep up my practice schedule and I don't need to buy a newer cue
Oh, and sometimes I go back to my old Meucci with a Black Dot shaft just for a game or two. I don't play any worse with that one now, either. I believe this only works because I was used to it for many years and it is not entirely different from the Ultimate Weapon shaft. Changing back and forth between entirely different shafts might not be possible as easily. In general terms I don't think it is a great idea to change shafts a lot. It is much better to keep up a strict practice routine.
No, because when I initially got my last cue - the more important part was the Ultimate Weapon shaft - it took me about 2 months to adjust. It was just too thin initially. So I switched back and forth between this 11.65mm and the 12.5 mm The Pro.
After about 6 months I definitely played better with the 11.65mm than I played with the fatter shafts BEFORE. I know for a fact that it was my tenacity and the fun I had playing with a new cue that made me practice a lot more. Now I keep up my practice schedule and I don't need to buy a newer cue

Oh, and sometimes I go back to my old Meucci with a Black Dot shaft just for a game or two. I don't play any worse with that one now, either. I believe this only works because I was used to it for many years and it is not entirely different from the Ultimate Weapon shaft. Changing back and forth between entirely different shafts might not be possible as easily. In general terms I don't think it is a great idea to change shafts a lot. It is much better to keep up a strict practice routine.