Well everyone, they really can't change the story too much, then it won't be 24 anymore, now will it?
1)It will always involve a terrorist attack.
2)It will more than likely always be CTU LA
3)The lead agent will always be Jack Bauer.
Those elements can never change.
Everything else is just filler. I don't know who the writers are this season but if they're the same writers from previous seasons, then the problem is just probably writers block. Then, i'm sure those *******s at FOX studios have a problem with the writers trying other things that seem too 'un-24-ish', so i believe there's multiple factors contributing to the lackluster this season.
Then there's us, the fans, who've tuned in for years. We may be the problem too. It's like if your favorite food is Pizza, and you eat Pizza everyday, no matter how much you love it, eventually you'll get tired of eating it, no matter how many different toppings they slap on there for you to try. We've become so use to the formula, that we see things coming a mile away, so now it's like 'meh'.
It'll be interesting to know what new fans of the show think of this season; if they've developed the 'third eye' most of us long time fans have developed through years of watching the show....like i said it may be just us.