No, Russia is not in decline as China does not have the raw materials that Russia has, and thanks to successive Putin administrations, Russian oil and gas and other precious commodities are securely in the hands of the Russian government (and not in the hands of Shell or BP or any Chinese companies' hands either; the acquisition of Russian oil and gas was and remains the main plank of American geopolitical strategy and to hell with democracy, ever since the fall of the Wall. This is why Washington hates Putin. It has nothing to do with rights, Pussy Riot, gay parades, etc.)
Brzezinski was Jimmy Carter's National Security Advisor. That is how old he is. He is a dyed in the wool Cold Warrior with a personal lifelong ambition of revenge against anything with even a whiff of 'Soviet' off it and if it doesn't have a whiff then he will imagine it does simply on the basis that it uses the Cyrillic alphabet. Brzezinski apparently can't deal with anything that won't fit into the only mould he knows anything about and hence his thoughts on Putin, who seems to have a far more subtle appreciation of the big picture than pretty much anyone west of . If your paragraph on what he says is a fair synopsis of what he believes then he is a crazy idiot and his thoughts are dangerous drivel.
The Baltic membership of NATO and the missiles in Poland (missile shield) deals were both fiascos. Nato doesn't need the Baltic states and its future is questionable and has been for a long time. American and British partnership in all the Middle Eastern adventures of George Bush and now Obama has rendered Nato something of a footnote. Poland didn't endear itself to its new friend the EU by being so cozy with the US. He oversaw the support for the Mujahideen (now the Taliban) in Afghanistan , on the basis that the current enemy of my current enemy is my friend. We have seen how well that turned out. Also on his watch, Iran was transformed from a friend of the US to one of its arch enemies. He has consistently chosen short term and partisan gain over smarter long term policy choices, leaving significant hostages to fortune in his wake at every turn. Pushing for advantage when you have the upper hand does not make sense every time.
The only reason he is now so antagonistic towards Russia and so in favour of policies that seek to push Russia into a corner is that he recognises Russia's current strength. The resurgence of Russia from almost the dustbin of history must have come as a huge shock to him. When he was an advisor to JFK he urged a much more conciliatory approach because he believed then that the USSR was in decline and not worth provoking. He completely fails to see that a strong Russia is needed to combat Islamic fundamentalism (that he himself lovingly encouraged) in post Soviet south Asia and in states that are former Soviet neighbours.
American support for the EEC and later the EU was partly based on the softly softly approach to the USSR that included detente and missile treaties, and partly on American desire to neutralise European fear of Germany, which even in the 50s was emerging as the economic engine of European recovery, which in Washington was seen as necessary to prevent Soviet conquest of the continent. Now that the EU has got a bit of momentum and has become a player in the economic financial world with a mind of its own (especially since the debut of the Euro) it is all 'fuck the EU' from Washington. America will not tolerate an upstart power, or an old one either, if it isn't willing to open its arms wide and accept economic rape or being told how high to jump when Washington snaps its fingers.
The current revolution is the successor of the Orange Revolution that resulted in Ukraine being run into the ground by the wide eyed and incompetent revolutionaries. The revolution in Georgia resulted in power in the hands of a person nobody liked or trusted and in the end Saakashvili was deserted by the west when Russia reasserted dominance, taking over the disputed Georgian territory to the accompaniment of much apoplexy but no action on the part of the US and its puppets, the British. The revolutions in Libya and Egypt have yet to play out to anyone's satisfaction.
Yes, the east of Ukraine is the industrial heartland, mostly Russian speaking and Russian in culture and identification. The west is agricultural and fought a guerrilla war against the USSR in the wake of WW2 for independence (ignored by the west as it wasn't convenient to intervene).