When I read some teeny tiny book later (like the Seanan McGuire's are really short), I'll have to remember that I really earned the end of these series, particularly Kingdom of Ash, which is a 1000-page book. But I finally finished all the series I started before the beginning of this year (that I intend to finish, at least). I feel pretty accomplished.
I probably wouldn't have devoted myself to KoA if a) I wasn't 7 books ahead of my 100 book challenge and b) didn't have a hardcopy book I wanted to read more than the sequel I was trying to find and finally bought on Amazon. Also, all my physical books felt too similar to books I was reading or just finished. I had a lot with similar themes (like the magical connection that would kill one person if the other died) between those series I finished in the past month, and some of the physical ones I want to tackle soon have similar themes, so I decided to finish the old ones off first.
Anyway, KoA almost earns that length. About 70% in, I was thinking, "Wow, it's long, but I wouldn't have her cut anything for a satisfying conclusion," but then there's an endless battle that everyone participates in and has to be shown how desperate it is from every single POV, and one had been in the battle thinking that since the halfway point, and I felt it didn't quite earn the length. Let's be fair, war is not my favorite thing to read about anyway, but fatigue really sets in when the final battle starts for some characters around the 70% mark of a 1000-pg book, and when every character thinks at least once about waging a "final desperate push" against the forces they're facing.
My other complaint is about the obsession with pairing off of everyone. And every single one of those pairings was heterosexual.
Still, it was a book that made me cry in a few places, and overall, it was a satisfying end to the entire series (although, since I refused to reread the series (or even books 1-5) before reading it, there was a lot of reorientation to the characters that weren't in book 6, especially those with similar names (Wait, is it Galan or Gavriel who's Aedion's dad? Is Evangeline actually Lysandra's daughter or just a girl that Arobynn was going to turn into a prostitute or assassin?)). For those starting the series, though, it is an undertaking, with some very uneven books in the middle (and one that seemed worthless at the time, but made me like a character better in the end...). Throne of Glass doesn't really encompass what the series will be. I feel like Heir of Fire was the first time I really got an idea of what the series would end up being.