Well, there's a lot of "if's" here. in your situation, assuming the FJR doesn't come your way next spring, it seems more likely you might consider selling or trading the K-S for the new RT/GT. You even played with the idea of the present GT for awhile. There's no question that the K-S is way more sport than tour.
My former GT was a very good 40 degree motorcycle; a temp. range we see alot in the early morning around the Northwet. Below that, I just won't ride a motorcycle. While the K-S, at least for me, seems to be a much better 50 degree motorcycle in the winter. I'm talking about relatively short 50 - 75 mile day rides, here.
I could be tempted by the new GT if it has most of the mid range performance of the K-S, feels nearly as light as the K-S, feels as connected to the road as the K-S (i.e. the fairing does not have the effect of isolating the rider); while at the same time has the added benefit of showing itself to be a very good 40 degree motorcycles. As a general rule, Beemers are not "hot" bikes, so summer heat (especially around the Northwest) is not a major issue as it would be for you.
I sure wish BMW would, at least, launch a tease campaign of some sort if they are not ready to release the bike, just so we could at least have a few discussion points on its overall design concept.