There's reason to keep watching, I guess: Hawaii is still beautiful; I like having Locke be a badass again as Not-Locke; Nobody does frustrated self-righteousness better than Jack; and Sayid finally gets to simply go "crazy commando guy" at will. Claire's just as whiney as ever, but at least no one's screaming "WALT!"
I think what I'm saying is that I haven't completely given up on them the way I just about had by the end of BSG. The writing still shows flashes of brilliance. For instance, this week Sawyer sums up the entire series in a deliciously choice phrase.
Sawyer (justifiably mystified):
"Can't you just turn yourself into smoke and fly your ass over there?"
"If I could do that, do you think I'd still be on this Island?"
Sawyer (with perfect sarcastic emphasis)
"No, because that'd be ridiculous."