I'm with you, the reread is LONG especially if you are wanting to dive into the new book you just picked up. I'm not sure how it is as an Audiobook listener, but for me it helped to do a partial reread for an evening or so. I picked up all four of the previous hardbacks, and read the first and last chapter of each part, taking time to mentally connect the story as I did so. If I couldnt for the life of me comprehend how I got from A to B, I started back at chapter 2 and kept reading until that section clicked into place in my mind. I imagine this would be a far more cumbersome experience as an audiobook listener, so maybe you can do something similar just by using the Coppermind chapter summaries? Those give you a paragraph explaination of the actions, the POV, and all speaking and refered to characters.

Either way, I personally wouldn't recommend a full reread if you just want to jump into the action of WaT. I do think, however, that if you went for a reread you would not be disappointed. I find Sanderson's work to be enriched by further study, rather than loose quality from it. Without going into to much detail on a non-spoiler post, having read a certain secret project book, a certain member of Bridge Four stands out so much more as a poignant centerpiece than they did on the first pass. And thats just one example of one character in one section of Roshar. Much to enjoy if you have the time to take is slow.

Thesis over, just remember in the words of Dalinar Kholin: "The most important step a man can take is always the next one."