Mr. Sanderson I wish you the best.
I don't know if you're going to look back in this thread or if you do if you'd want to hear anything from fans of WoT but in case you don't mind I hope you don't think it amiss if I share some thoughts.
I hope you are someone who truly loves the series. WoT is my favorite fantasy series and knowing it as I do I don't see anyone who doesn't genuinely love and respect it doing it justice. (If you don't, well you'll just have to work harder!) I don't know if you've studied Jordan's writing beforehand but there is often stuff there that one will miss if only perusing casually. I'm presuming if you have detailed notes on hand this should become obvious.
It being the last book and with so many loose ends to tie up I fear writing the book may end up being merely an exercise of going from points A to B to C and revealing one thing one after another. Please take care in properly constructing each revelation so it doesn't feel like a series of info dumps. Also remember to give his characters the free reign they need to come alive.
Capturing the essence of Robert Jordan's tone and style may well be one of the harder things to achieve. He had a distinct sense of humor and infused his writing with a certain sensibility. If you ever have trouble thinking how something should sound, maybe you should think of Mat or think of how a gracious southern gentleman would handle it. From what I can tell from your bio that shouldn't be so hard since it appears you are one yourself.