And I'm not saying it's a terrible thing.. but Wolverine on the cover sells a book. It's a tried and proven fact. "This issue someone DIES" sells a book, no matter who the writer or artist is.

As far as Perez on the Avengers.. I just don't know what it is. His work isn't perfect by a long shot.. but the combination of his style and ability to put thirty unique characters on a page all at once so perfectly makes him the Ultimate Avengers Artist.