The first couple of books are pretty tight, with all the characters having things to do. Dragon Reborn is also pretty simple, but Rand doesn't do much, and that tends not to work well on TV. I think each of those would work well as 6-8 episodes seasons, but after that, things get a bit more...
From the first book, I think it would break down pretty well into a season of a TV series, but there are multiple characters who would appear in one or two episodes and who come back to be either main characters (Min, Elayne), prominent ones (Domon, Aram) or even just brief appearances (Paitr)
I...
Cadsuane.
They can probably cut the whole traveling circus storyline, or at least condense it, so that it doesn't last 15 series like it did in the books. The Shaido didn't really go anywhere - they just left in the end, so I don't know how much we would lose if that was very much cut back
The...