I read through just before the Gathering Storm in summer 2010 and picked it up when it came out. Both the Towers of Midnight and A Memory of Light--without having re-read the preceding material since as recently as 2010--were difficult to keep track of. If you haven't read anything since 2005, I would imagine the only way you're going to be able to catch up is to re-read, which is understandably daunting. I do not know of any resources that will also be spoiler-free for the last few books, unfortunately.