Some more spoilers included

The Jaime/Brienne arc was one of the more boring one's to me in the book, the TV show has made it one of the most interesting.

I think they are still going to have a massive hurdle trying to deal with the fact that Dany's entire arc turns into pointless filler as soon as her conquests are done. Worse then pointless filler, since Dany's behavior goes from clever and logical but also ethical and ruthless to... absolutely retard mode while wallowing in angst.

She next shows up for a cameo in Jaime's POV in aFfC and is sent off to the crag under guard with orders she's not to marry for two years and secret orders to kill her if an escape/rescue is attempted. There's a theory kicking around that she might not have been Jeyne, due to description change in the book, about her hip size.

Of course a more popular one recently and specific to GoT is that they didn't just do a name change to Talisa from Jeyne, since they already had a Jeyne, and some background variance, they did a total overhaul and she's actually Tywin's agent, and it actually fits. Which is a pretty compelling case, regardless though they're obviously planning for this version of Robb's wife to play a much more significant role.

I'm still giving them the benefit of the doubt that they're going to pull this one off somehow, and actually add something to the plot, but I'm not thinking so.