Posted 10 May 2012 - 11:12 AM
While the show has been different from the books, it's been mostly in details that aren't really that meaningful; Arya still wastes her first death on a vile soldier as a "test", and uses her second out of an immediate need (in the book she felt she had to get out from under Weese's watchful eye before she could do anything useful; the show crystalized that need a bit more urgently, and killed off a minor character only a bit before his death in the books at the hand of a character that has so far been cut).
I'm fairly confident they'll keep the third "death" largely the same, except that it will be Bolton that gets captured (economy of characters), and Bolton's takeover of the castle won't be aided by a Lannister turncloak (since we have no Vargo Hoat, Amory Lorch is dead, and it's a little late in the season to introduce a new major Lannister henchman out of the blue). That makes Arya's effort a meaningful thing, not the empty gesture that it was in the books, where the entire capture was a ruse and Arya just gummed up the plan a little (which I actually think will be an improvement). Tywin will have just left for KL with Littlefinger (I'm guessing they'll skip over the whole Battle of the Fords drama, since without an Edmure there's no real point to that), but that gives them the endpoint of showing up in KL at the last moments of the battle and saving the day with Tyrell troops from the alliance that LF forged, which is still right there with the books.
That also still puts Arya in a position to be Bolton's cupbearer, but have her realize that Bolton is every bit as bad as Tywin was (if not worse) and decide to escape (hopefully still with Gendry and Hot Pie) rather than risk revealing herself. Which will be intercut nicely with Ramsay's sacking of Winterfell and the revelation that the Boltons are up to no good, allowing the viewer to realize that Arya did the right thing.
D&D aren't changing things just to change them. There's been a lot of necessary compression but from my POV it seems to have been dons specifically so that they can still get to the end point of the books.
As far as LF's glance, I don't think he recognized Arya, other than perhaps getting a slight tinge of recognition but not being able to place it. It's possible they're setting up a Eureka moment for him later, but it will be after it's too late for anything to come of it and thus won't actually effect anything.