When did MITM change from through the eyes of Malcolm to more focused on all of the characters? If you watch the first season then watch some of the later episodes, it is easy to spot.
Good question! It's hard to pinpoint exactly when, but I think the shift started gradually in season 3, then was really apparent in season 4. It seems that when Malcolm got to high school and the Krelboynes broke up is when the focus went from mainly on Malcolm to all the characters.
I personally think the show is alot better centering on not just Malcolm, but everyone. In fact, can anyone remember a recent episode that focused on Malcolm only?