The 3D in Zen Pinball 2 is definitely worth checking out. It's the first implementation I've seen that doesn't feel novel. I play in "View 1" which is a static camera. The table transforms from a squished square to a full rectangular playfield. Some of the 2D tables now seem incredibly distorted to me; the Hulk table, Moon Knight, and Thor seem the most noticeable. Oddly the 3D doesn't seem to improve the Blade table, but the Spiderman, Infinity Gauntlet, Fear Itself, Tesla, and Ninja Gaiden tables are drastically improved.
To answer the original question, "Yes, the 3D support on Zen Pinball has certainly improved my skill. My estimations for speed of the ball were confused at first, but now the ball speed appears to be consistent since the perspective includes depth perception."