I'm surprised you call it glitchy. I heard elsewhere that Resident Evil 4 on Wii was easier than the GameCube original because the aiming was more precise than with a stick.
They can both be true! It worked great probably 97% of the time, but the 3% where it flicked 20px to the left for a frame or lost tracking entirely add up over the course of a boss fight. Missing when using a joysticks feels like a skill issue. Missing when using the WiiMote could be frustrating.