I agree on all points.(although I haven't seen the Amalgam cover) Maybe it's the inker that makes it look like someone trying to copy Lee, or he just didn't have as much time on this as he'd want. I mean, it's a crazy number of characters to try cramming into the space, so it's certainly not easy, but the oddest composition to me are Colossus's eyeline (it seems he's facing off against Wonder Woman, but he's looking into the distance rather than her), Superman's pose and tiny Robin right behind Deathstroke's backside. And yeah, the type of shading the colorist employs does this piece no favors.