If this is going to have any impact whatsoever, it's going to have to happen a lot quicker than 4 years.
Well, yes, but the European MO throughout this crisis, partly driven by political pragmatism and partly by denial about the depth and urgency of the crisis, has been to make announcements and hope that will keep things from exploding while the things being announced are put in place a long way down the line. Remember the ESM? The thing that was announced in 2010 that's suppoed to replace/bolster the EFSF? That still hasn't been ratified.
What's involved in becoming one? More than just hiring staff, I take it. Four years sounds like a long time to get off the ground.
Well, I'm no expert on it, but bear in mind that the ECB has zero regulatory apparatus at the moment. No bank examiners, no enforcement regime, no rules, no procedures and no IT infrastructure to directly supervise banks. It sets interest rates, it lends money to banks, and it holds a shit-ton of collateral. That's basically it. And, to be honest, it doesn't even do that most of the time - the national central banks do it under the aegis of the Eurosystem. Now, conceivably, a similar arrangement could be cobbled together to have national central banks do supervision within an ECB framework and with ultimate authority lying with ECB. But a) it's far from clear whether Germany would be happy with that, given wide variations in national central bank behaviour before and during the crisis, and b) not every country's central bank does prudential regulation either. And, even if all those hurdles can be overcome, it's still going to take time. It took over a year from the first legislative proposal for Europe to basically rebrand CEBS as the EBA and hand it a little bit of standard setting power.