a band-aid solution at best. The fact that putin has desires to resurrect the soviet superpower, is the problem, and i doubt there would be any possible diplomatic solution to that.
Nobody likes war (least of all nuclear war), but if the threat of such weapons is shown to be a bluff, the peace brought about from it's use in WW2 would all but be in vain.
Somebody must back down, and i would say putin and his ambitions must be the one to back down, or the US & allies must escalate. Otherwise, the next authoritarian country is going to want in.