trade and economic growth will be limited if membership is limited, which is why having a financial line to cross before membership is useless, because then you are stopping your own growth.
IF the EU wants to grow, then they need to accept new members, each for their own advantages....
My thought on the EU is always this: what happens if your country elects a leader that is anti EU, and is serious about quitting or not joining, especially in countries such as mine, where the populus has mixed views....
we are losing part of our culture, in good and bad ways, just by trying to mold into EU requirements.....