even if bitfinex returns as a "better" exchange, people will do everything to avoid it. no one serious will keep using an exchange runned by incompetent rookies. traders will move to bitstamp or kraken.
Sadly I don't think this is the case. People are too addicted to margin trading and liquidity. Greed rules all even when it's interspersed with being raped as well. I hope they dwindle to nothing but I'm not holding my breath.