By far a Predator shaft is the most consistent, accurate shaft on the planet. Everyone else is just trying to follow their lead and come up with a better way to lower deflection but unfortunately with the material of wood, predator has already appeared to figure out the best way and patented it.
Another thing is: You break your shaft and your in any large tournament,
grab another predator and your back in business. You break your one of kind custom maple shaft aged and dried for how ever many years and replace it, it will in most cases be a completely different feel, hardness, stiffness, different tip, etc....You will not feel confident shooting for quite awhile IMO. At least not comfortable putting inside english on shots beyond 4ft..
ON the flip side.
It really depends on how long you have been playing and what you have been shooting with for the last ? how many years and last but not least, do you spin the balls often or do you rely on english for a reasonable percentage of shots. For example, if you have been using a (high deflection 13.4mm) house cue for the last 10 years and your up to the point that you can run 5 out 10 racks of nine off the break or more... There is a good chance the lowest deflection shaft on the market might not be your first choice when replacing that broomstick

. Although with predators new fat shaft, Im seeing and hearing more and more seasoned players making the switch easy. It appears to be the best of both worlds, you get all the technology and edge but with the feel of a fat maple shaft with a 20% aiming advantage.
I think why people might go with a Ob-1, smart shaft, red dot, or what ever is because for some players that know how to compensate at average levels for deflection, squirt etc...Where they think the compensation is, those particular shafts happen to fit like a glove to that particular players perception and stroke. Im a big advocate of trying as many brands as possible to get a feel for whats right for the individual.
I have played with house cues, mariposas, Mcdermonts, vikings, duffrins, Schons, red dots, no names, Southwests, Cognecenti's, cuetecs, the list goes one.
If you lived in Chicago I could give you a personal demo, and evaluate how a predator shaft might benefit your game. Im a Predator dealer, I have demo shafts you can spend a few hours with..Or more if need be..