It is sad, because Ukraine always seems to be stuck between two fighting side, Russia and Europe. It was same during World War 2, when they were stuck between Soviet Union and Germany.
In an economical prospective, it might be better for Ukraine if it joins the Russian-led customs union.
That's the way the USSR worked. Russia and Ukraine together accounted for more than 90% of the total population (and 99% of the productive population). Russia had infinite natural resources, which were shipped to the factories in Ukraine, where the Ukrainian manpower produced world class engineering products. At that time, both Russia and Ukraine were inter-dependent on each other. Russia bartered its oil, gas, timber and mineral ores for food grains and meat produced in Ukraine, Belarus and Moldovia. Now Russia is a net importer of food, while Ukraine is heavily dependent on oil and gas imports.
The reason why the USSR disintegrated is because the unproductive population (mostly Muslims in Uzbekistan and Azerbaijan) increased much faster as compared to the productive population. However, if Russia and Ukraine creates an union state which excludes parasites such as Uzbekistan and Tajikistan, the people on both sides would benefit from it.
If Ukraine joins the EU, the government will be forced to take up austerity measures. This can include reducing the subsidies and pensions. It will adversely affect the lower middle class and the poor. However, the elite and the urban middle class will gain from new business opportunities. Also, the Ukrainian factories will be forced to adhere to the European standards, which would require new investment worth some $200 billion. No one is having that much money there. So there is a possibility that if Ukraine joins the EU, the Arabs and the Chinese will buy up 90% of Ukraine.
Some of your facts are wrong.
Republic Population of Republic (000s) 1979 1989 % urban 1979 Titular nationality (1989) Russian (1989)
Soviet Union 262,436 286,717 67 - 51.4
Russian SFSR 137,551 147,386 74 81.3 81.3
Ukrainian SSR 49,755 51,704 68 72.7 22.1
More like 60% of the population.
The Baltic countries were heavenly industrialized compared to Russia in %.
Their GDP was way higher than soviet Russia , in some cases more than 40%.
Also, Russia is one of the biggest wheat exporters in the world , with double the amount of Ukraine.