Bugs and glitches are important and online leagues are nice, but I bet that less people will use them than you would think. Regardless, given EA's previous track record, neither of these things will be right anyway.
The online season will probably suck and online play will probably be terrible as in the past. The same bugs and glitches that were in the game last year will probably still be there.
I swear if the game doesn't ship with the same fumble issue and simmed CPU INTs issue, I'll be shocked.