My opinion is that Ukraine had exhausted natural resource and limit of USSR inherited industry. Ukraine has no money to renovate it so it will just disappear. So political elite have to decide where to put population and where to get money for themselves from. Some facts say that Ukraine is going to transform into Latino-American agriculture-type country (such as newly announced law about selling the land). Land will be divided between political clans. Population is planned to be exported as labours to other countries. And here is the problem. Western part of the country for 20 years works in EU and eastern one - in Russia. That's why Ukraine wanted to sit on two chairs. To be associated with EU and to be an observer in Customs Union. But tensions between Russia and EU are growing today, so they both have radical position - only with us totally.
But EU has many internal problems, it is very "loose", so they just don't care about Ukraine. And it seems that Russia had just bought Ukraine politicians.

Speaking about Moldova, they have a problem with Transnistria. Moldovans are threated to be Romanians (political course) because Romania is a part of EU. But for Transnistrians Romanians are just "Gipsy scum". But from other side there is Ukraine and if it will became EU member Transnistria will get a problem. They would like to unite with Russia but it is distant, so they live in "pending" style for years. And EU today have enough problems with Kosovo, Basques, Catalonia etc. I don't think they like other "poor eastern sh.it" plus having separatists. Only Romania is interested into Moldova inclusion because it will be easy to claim it as a part of Romania (other political sh.it, you see).

P.S. In fact Ukraine anarchy and political situation is the same as it was starting from the XVII century, when it formed as so-so exact territory. It is separated into 4 parts. Western - was under Austria-Hungary/Polish rule, so they are Western Europe type. Eastern - industrial, mines etc. Heavy populated from Russia they are tied with Russia economically and see no future as an agricultural part of EU. Crimea - is a part of Ukraine only from 1954 (was transferred from Russian SFSR to Ukrainian SSR because of administrative reasons) in fact is Tatar/Russian by culture. And tatars are becoming a problem in Chechnya style. And central (last but not least ) part, plays different political games. Corruption, state contracts, etc.