I am afraid, you might be underestimating how serious it is. The troops seem to be on the move. Trusting Putin's words is not something I would ever do.
Lukin's role is a case in point. Personally, he is a decent man, but he is not somebody at all privy to any secrets or representative of anyone. He is not close to Putin or to anybody else with real power. Sending him was a statement of no commitment to anything: Putin's press secretary explicitly said that he was going in merely his own capacity. Lukin knew that: that is why he refused signing anything - he could not, really, as he was no envoy of anyone. I would easily believe, Lukin was trying to be reasonable and helpful. But the fact that it was him who was sent is very troubling, actually. It might mean that a decision not to talk but to act unilaterally has been taken already.
I am afraid, we may be on the eve of a Munich. Or worse.
lol