You may be right because Thion plays a major role towards the end of book 3.
Anyhow, I think I kind of figured out why 3rd series was so confusing in the beginning.
The 3rd series are split in 2 books. The 2nd book slots into the timeline of the 1st book, which is why there are scenes included that may not be familiar to people who have not read the 2nd book of the 3rd series. I have read the books a while ago but if memory serves me right, the 1st book focuses on everything but Westeros. Please help me out if I got that wrong.