Weak or not, — all that is relative, — the post-Soviet world remains a parasite on the Western Civilization’s body. The moment the West closes the pipe with the visas, high tech products and, simply, food, whatever it is that Putin think he has collapses. His own buddies will shoot him and that will be the end of his Crimea conquest.
However, if the West remains weak and continues to sink into decadence, another tyrant will come to take his place.