In my opinon, the new water cooled GS does not need/should not compete with the new 150 h.p. Multistrada (or similar); heck, the Multistrada is really just a big upright sport bike, which stole a lot of style que’s “this time” from the GS along with BMW’s ESA. Also it’s gotta chain and “no” telelever front end.
What’s great about any GS really, is its ability to be easily altered to suit a variety of riding styles, i.e. touring, fire trails/dirt, canyon carving/sport riding. Also, it's opposed twin motor provides great “real world/usable power” and has wonderful gyroscopic’s/balance.
As for the new water-cooled GS, I am eagerly awaiting it and hope that BMW builds on from an already fantastic “real world” do-it-all machine, if I want more h.p./upright sportbike, heck there's the FZ1, Ducati Multistrada to name a couple.
Dana Point, CA.