The first year after switching to a traditional bow my success rate was about the same, but the size of the critters dropped a little. That year I killed a mountain goat, black bear (spot & stalk), a few whitetail does (at least 3 but it may have been 4-5), a whitetail buck, and a cow elk.
When I started big game hunting at the age of 28, my dad told me: Hunting is like fly fishing, 10% of the hunters/fishermen consistently harvest 90% of the game/fish; Determine what it takes to be part of the 10%, then do it, you will enjoy your hunting/fishing a lot more than the other 90%. Dad had told all us kids that fishing adage since any of us old enough to remember. He wasn't a great hunter, but then that wasn’t his passion, fly fishing was; I have yet to see anybody catch fish on a dry fly like he did.
Guess this is a round-about-way of saying that in my experience, it is the hunter, not the equipment that determines success.