That's a good point-- and we are usually a little behind here in getting new models. However, I was thinking more in terms of production-- I think all the various Impreza models are produced at the same place, but doesn't Ford produce it's european models over there? I thought it might be too expensive to have an assembly line tooled for 2 different body styles.
Anyway, it will be interesting to see what they decide to do. Personally I like the current style, and I would be more than happy to get an STi version of it; however, if I knew that in the short term there would be a facelift (and it seems like this will happen), I would be tempted to wait a little longer to see what they do with it.