Parmandur
Book-Friend
I mean, Jordan did nail the landing, with a bit of help: the amazing climax was his work, fire sure.To be fair, Martin didn't finish his work. Weis and Benioff did for the TV series (working from an outline? not 100% sure).
Jordan expressed a huge fear of his was "pulling a Lost," ie not sticking the landing/finale of the series, so it's sad that's exactly what happened (well IMO and many other people's).
The shows ending is Martin's ending, particularly in the parts that disappointed people.