Following the tragic death of Cory Monteith, it may not be important in the grand scheme of things - but it's something Fox will need to consider:
How will Glee Season 5 handle the passing of a central cast member?
It's not unprecedented for programs to deal with the loss of an actor or actress.
The West Wing gave John Spencer's Leo a heart attack. Just last year, Dallas wrote in a funeral for J.R. Ewing after Larry Hagman died.