Probably a bit of Column A and a bit of Column B. I think you're right in that he has a lot of potential to be a good winger in MLS, but he has tailed off a bit and there could be more than a few reasons for it.
At the end of the day, it sounds like most fans from both clubs are happy with the dead, but barring any unforeseen negotiating craziness I think we edged Columbus out just a little bit more.