I haven't read "Rides a Dread Legion" yet ... but as I've said elsewhere, I don't think the ending can possibly satisfy. Let me draw a parallel to another author who is much more famous than REF. I'm talking about JK Rowling, and the Harry Potter series. With the rabid following she had, there was no way her series could possibly have had a satisfying end. She had several routes available to her, but none could possibly have been good enough.
I think the same goes for Ray. Unless Pug's visit with "Lims Kragma" all those books ago, where he was told the consequences of his choice, was a red herring, then we already know that the end of the cycle will feature more deaths than the last five minutes of "The Departed". And we also know that Pug will die. The last book is titled "Magician's End", so that in itself implies that he will die.
As for wishing Ray had gotten to this point a little faster, I don't. I enjoyed quite a few of his books that didn't necessarily push the story along. I want to know the end of the story, so I'm glad he's rushing now to make sure he can tell us ... but at the same time, the amount of time invested in writing some of the earlier books (The original riftwar cycle, the sons books, the empire trilogy, and the demonwar books) really shows. I have found repeated enjoyment in reading them, whereas I'm not sure I'll read some of the books since again at all, let alone the many times the earlier books have been read.
But the journey has been worthwhile. Think of some of the characters we got to meet and read about. Bobby de Longville, Gamina, Jimmy, Nakor, Eric and Roo ... heck even Kaspar was worthwhile. The amazing look at the Tsurani culture afforded by the empire trilogy. To watch Mara's journey from a child to where the third book ends ... absolutely gripping every time I read through the trilogy, even though I already know all the best parts. Ray may have fallen off in his later years but I have enjoyed countless hours thanks to him.
I wouldn't miss reading through till the end for much of anything.