I agree his writing isn’t as strong as his art – though that’s not surprising since his art is freaking GOD-TIER and if his writing was as strong there would just be too much talent to contain in one body.
He’s done a few other works before and I think since. His OGN of Batman: Noel was really good (I tend to read it every Christmas time) and he had a Vertigo series called Suiciders: Kings of HelL.A. that I’ve heard good things about.