I think Greenwood is a victim of his own success, I've read that he'd much rather do other characters than Elminster but that's what the brass expects so he gets stuck writing plots for Mr. Invincible. Personally I think every book of his since Spellfire has gone downhill, I wonder if that's because the editted the hell out of Spellfire and have gotten more lax or that editting sense spellfire has gotten worse.