See, I, too, liked Giffen's earlier style, but I go way back to his work on Challengers of the Unknown, which had a thinner line and a crazy amount of detail. I loved it when he first came to Legion. By the time he was getting ready to leave the book, he had adopted the Jose Munoz style that people were so up in arms over. Everything was in your face and he was using a 9-panel grid. But, it was still good work (I loved his Ambush Bug and Son of Ambush Bug during that period). I was so excited to have Giffen back on Legion this time because I thought he might inject some energy into Paul Levitz's lackluster stories. Don't get me wrong, Levitz's is turning in good work, but it kind of feels cold -- just like his return to the JSA a few years ago seemed to be. But, I was also dreading this pseudo-Kirby style that Giffen is currently using. Heck, I'd take Munoz-Giffen back any day over Kirby-Giffen!
I really hate that he's off the book after only two issues. I'm praying that it's not health-related issues. We may never know, though.