He hasn't made a reference to the magic and shitz for a while. That was just one of the story arcs, and he usually doesn't stick with the same arc for more than a couple weeks.
I wasn't a big fan of the Macbeth arc, but that's maybe just because I never read Macbeth, so I didn't really get the jokes.
I doubt the majority of the readers did. xD
But, being forced to study English Lit for 4 years and running has some perks.