It is not in Ukraine or Russia's interest to partition the country.
The Kiev government has lost control of eastern and southern Ukraine.
Calling parliamentary elections in Kiev when so much of the country, with millions of voters, is no longer governed from Kiev, is a democratic farce.
The current Kiev caretaker government is widely regarded as Fascist by many and, in some parts of Ukraine, the majority of voters. Any attempt to validate the agreement with the European Union by the current Kiev government will be regarded as illegitimate by much of the population. And by Russia.
The response to this has so far been disastrous. At least 2000 people have been killed. The EBRD has produced a worst-case scenario in which the sanctions implemented and threatened against Russia will precipitate a Russian recession and bring growth to a halt in the area; there will be serious contagion throughout the global economy and, first, for Europe.
All European former socialist economies have distinctive features arising from their soviet-type starting model. Escorting them and assisting them through transition is now a well-understood process, if hotly contested by those who want to punish the former socialist errors (and socialists), and those who seek to provide the best route to an economically and politically successful society.
Such a society would not conform to the hyper-liberal, crony capitalism so beloved of the corrupt of all capitalist economies (sadly only too well-represented in some of the already 'transited' states that fought back to create a more balanced and indeed moral, as well as efficient, economic and political system and thus largely completed the transition).
Abolishing or reducing to a minimum the role of the state in transiting economies is not clever. Market institutions must be created, there must be investment in modern infrastructures (just consider the backwardness of the highly inefficient energy consumption levels of Ukraine industries), market regulation must be a state function, and for any reasonable person there must be great importance given to the provision of employment, the alleviation of poverty, and the assurance of social peace.
Russia will not accept Ukraine (or any other near-abroad state) practising the politico-economic aggression of hyper-liberal, crony capitalism. In the interests of its defence requirements it has formally annexed the Crimea. Informally, bluntly, it has annexed also Ukraine as a whole, rejecting the kind of development that will lead to an unstable and inegalitarian capitalist free-for-all.
Central Europe - Austria, Germany, Hungary, Poland, The Czech Republic - really doesn't need this pseudo Europe of the UK, US, and Baltic peripherals, trying to put tanks on Russia's lawn.