Fair enough, on a serious note...
Its in development. They flat out tell you that. Its on the Legacy page. Think of it as kind of a beta test. The real question should be: "Should they have made it available to the players at such an early stage?"
My answer would be: absolutely; considering they do grant a reward for wanting to achieve a legacy, that is the legacy name. Granted, its not much, but at the end of the day you are complaining about having more features with zero negative impact...