I agree Champion is behind in damage, but you will pick up an offensive and defensive style (+1AC), and also presumably your adding +Con instead of +Int.Not really. It will still be ahead as EK's also get masteries.
Champions will continue to be mediocre because WOTC designed them assuming anyone who picks them either doesn't care that they're weaker or won't notice.
So you end up with something more well rounded. Which is fine for a generic fighter.