Ukraine made such a big deal from this. As the result they will be only poorer, even with only association. Look at Bulgaria. Look at Greece. Look at Romania and so on. Europe does not need anything from these countries. Not even as a workforce.
The Western Europeans might not need the workforce, but for sure they need the ready access to these markets. Western & Central European markets look saturated right now. The only growth is occurring in the east, especially in countries such as Croatia, Baltics and Poland.