Well, was just looking at our 'temporary' update to wptedit's imagery layer, and one of them already shows the interchange completely. It's shown on both of the 'HERE' imagery layers. Don't know if we can use them for the location info, but I'd just thought I'd throw this out there.
As for updating OSM, I couldn't find an imagery layer that was far enough along to be able to add it legally to it, so I didn't even touch it in OSM.