I dispute that. Gemmell's endings are quick and to the point because his books have a small cast of characters, even smaller by the end of the book, with the size of the cast in SOIAF i'm sure you would receive your ending.
No, the reason i mention Gemmell is because he is the only writer apart from Martin that i have encountered who can truly get inside the minds of his characters and create some truly beautiful inner thought monologues without rambling. Two examples, same book, in Ravenheart we are introduced to the teacher Aterith Shadler early on as a stock minor antagonist but at the start of the closing act he re-emerges as an unlikely and unlooked-for for hero. In fact, Shadler is one of my favourite characters in this story because he has no martial knowledge or ability, physically he is quite 'weak' and yet he still draws his line in the sand and does not budge in spite of the retribution visited upon him. What a hero! And it is Gemmell's explanation of the character's mind which makes this believable and thusly so much more heroic.
Second example: when Maev sees Jaim naked and gives him the sharp side of her tongue (which is sharp indeed) then once she's left the room nd closed the door, she can't help grinning to herself. Such a tiny little sentence gives us SO much insight into Maev Ring and her feelings for Jaim when all we otherwise see from her is constant condemnation of Jaim's behaviour...
Sorry, i disagree. If Gemmell was still with us and GRRM died, he'd be more than up to the task...