Correct me if I am wrong, but the Academy Awards only takes place on one night. Not really sure how that causes a show to be off the air for 3 months.
But the night it takes place is the end of February (which i do NOT think is very changeable)....makes it hard to schedule an entire season of uninterrupted episodes.
While that one interruption probably wouldn't be a big deal...the way ratings are nowadays, any little drop is harmful, at least for the big networks.
So we have the Fall Semester & Spring Semester schedule, which works just fine for me.