That would make sense but then why weren't they ready with their speeches (that all of them usually write in advance), why there were so many discrepancies including one guy being cut out in edit altogether... You'd expect them to be fully in agreement with him beforehand — and you'd expect some trust from Putin in return, which they usually get.
They are, literally all of them, that's why it's so surprising.
As for Shoygu — I'm not so sure. Unless this whole thing goes along swiftly and with little-to-no losses in personnel, like Crimea, he probably will. But I can't imagine it going that way if Ukraine decides to step up (and they will) — and losing a lot of soldiers in a pointless war, even if he wins it, isn't going to earn him much popularity.