It has Magic Guard now.
That means it can effectively run Life Orb with substitute without any conflicts from Sand, Life Orb, Sub, and entry hazards. It also makes Focus Sash a viable option.
Focus Sash means Alakazam can switch into things now, or actually get a second life during a sweep. It can check so many things. Imagine forcing a switch, getting a Calm Mind, survive an attack with Focus Sash and get a second Calm Mind...
It just seems pretty impressive.