I can only speak for myself:
I hate grab bags of elemental damage. I love theme. The Swordmage is a grab bag of elemental damage class, much like the Wizard.
I like the potential of the swordmage. I think it could have been truly great, and maybe someday as the number of swordmage powers proliferates it will become possible to make characters that avoid the grab bag effect. But right now I don't think its possible. Its too much "have a lightning spell here, a fire spell there, some cold over here, and whatever you do, don't theme your character in any meaningful way."
So while its miles away from 3e gish classes, its miles behind something like the Avenger or even the Warden. I know people hate the Warden and all, but seriously? It themes awfully well. Throw together a goliath warden themed off of manipulating and even becoming stone and earth. Its easy to do, incredibly thematic, and mechanically both simple and solid.
In fairness to the swordmage, its "grab bag of elemental damage" theme is probably there because a lot of people like that sort of thing.
But I don't like that sort of thing, and its my vote, so nyah.