Last I heard they were going to make a revo break shaft & another smaller diameter shaft, something in the 11.85 range I believe possibly geared more for SNOOKER. I didn't hear anything about the next breaker being a Revo Shaft.
I personally feel the shaft now is great for breaking, just throw a break tip on it. I choose a 12.4mm Revo to break with because I was tired of all the 13+mm break shafts. If you ask anyone that I shoot with they will tell you it improved greatly. I only play 8 ball & I pot balls on every break consistently now & I even snapped the 8 in on my 1st break with it. Have come within half to 2 inches of snapping it in on many occasions since.
Fwiw, I do shoot with the 12.4mm as well.