I think the main goal to aim at, is the restoration of Ukrainian territory, including the Crimea and the creation of a military and economically VERY strong Ukraine, proud member of NATO and EU, that can take on Russia any time it choses to. A bleeding wound in the side of Mother Russia, that will only heal when left alone. All the rest is wishful thinking. Russia will never change.
With regard to 'punishing' Russia. Well, to live in such a country is punishment enough, me thinks.