The new tiller was introduced by LaserPerformance. To my knowledge, there's no need to switch to the new tiller if (Big IF) the modified rudder is accepted by the Class, and put in production by LaserPerformance.
You're right, it is not carbon. I guess am more curious about how a stiffer tiller with the current blade might help. I did hear some postive feedback about how smooth it handled as opposed to the wood tiller. If there's less flexing on the tiller, does that help control weather helm too? just wondering! The cost is still $200+ though!