Yeah, 1.6 WAR (much of that I'm assuming is defense and 70+ odd plate appearances more) is not a minuscule difference - however accounting for salary and all that, well, its reasonable to say if there were concerns about Harper they're not entirely diminished. I wasn't as full-throated pro-Harper as many on this board, but reticence to sign him only makes sense if you're also committed to putting that kind of money into improving the team in other places, which it turns out they very much weren't into.