This past summer, I was contemplating moving down to 15. I was talking it over with a guy who bowls in my summer league who is a Regional Pro. He said that since I don't have any problems throwing a 16lb ball, he sees no reason to make the switch. I brought up the extra revs people have seen by going to 15 and he told me that I didn't need it.
15 vs 16 is going to go on for a while. Moving down or up just to do so is silly. If you are getting too much deflection with a 15, then move to 16. If your arm is getting tired too quickly or you have other physical limitation, move to 15. Other than that, standing pat is the best thing to do.
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