Giles is ineffective, and regularly risks the lives of children. Giles constantly puts others in danger, saving himself from risk. Giles is the center of the show. Giles has to go. Its inevitable, Willow is headed down the same path as Giles.
Willow works hards and takes risks more than anyone else.
Willow takes a lot of risks for others. Willow is a good friend. Willow puts people in danger when she tries to help. The gang would be better off without Willow. Forever changed by his first Halloween around Buffy, Xander has incredible new depths.