Don't get the idea that I'm actively contemplating and deconstructing 11/22/63, but it's been crossing my mind off and on since I finished it Tuesday night. But here's the deal: I've decided that the main storyline was, to anyone who's read at least a few King novels, as predictable as the sun rising each day. You know the formula.
First there's a long build-up where the reader is bludgeoned with the central character's bona fides... "I am a writer. I am easy-going and likeable in a way that 'squares' could never understand (e.g. I am Bill Clinton-cool). I'm a dork, but an interesting and sexual charged girl-next-door tears off her clothes shortly after meeting me. Etc." In other words, dorky Stephen King gets to right all of the insults of his own dorkiness by implementing his central character as an avatar. Hence bullies are bested, chicks put out, and the weird dude is actually the cool dude.
Next, we meet the monster, which in this case is a malevolent force determined to kill people and use all sorts of dirty tricks to stop do-gooders who want to spare the killees.
Then there's a Big Plan, where the protagonist and helpers hatch a cannot-miss tactical assault upon the monster. As always the plan is good. Water-tight, even. Of course it completely goes to shit, the good guys are sent scrambling, and at least one of the peripheral good guys must die. Central character gets beat up a bit, but he prevails and good kind of triumphs.
On the other hand, I really did enjoy the romance subplot. I don't read a lot (any?) romances, so I cannot say if any of this was original. However, after a while I realized that I was rooting for these two decent people to overcome the challenges to their friendship & then coupledom.