Charles, I am no fan of government regulation and agree that the government was a big part of the bubble through its loan guarantees. I also think that solving the "too big to fail" problem would be a lot easier if big financials firms were not so good at lobbying. All you have to do is have a ratcheting scale of reserve requirements for financial firms so that larger firms have to maintain more reserves. This will ensure that banks are not too big to fail and we then don't have to bail out their shareholders and bondholders in the event of insolvency.
But coming back to the original point of your post, we have two options with respect to central banking:
1. Have minimal central banking and let the market determine interest rates. This was pretty much the practice during the 19th century and the U.S. economy grew rapidly during that period. (This was also a period of virtually unrestricted immigration.) The only downside of that period was that the economy was highly volatile with periods of great growth followed by periods of extreme recessions.
2. These days, we have voters firmly latched on to the government teat. They want the government to solve all their problems, including the "problem" of the economic cycle. Even a mild recesssion is considered a failure of government. This has led modern central bankers to have both inflation targets and economic growth targets and they conduct their activities in coordination with fiscal policy. The net result is that we have a more stable economy and also a net lower long-term growth rate.
I am very much in favor of a laissez-faire approach to the economy and have no problem with accepting more volativility in exchange for higher long term growth. I actually think volatility is a good thing for prudent investors because it creates more buying and selling opportunities. But I do not see the populace embarcing this approach and think that our anti-volatility attitude is going to continue.
This then leads to the question of how to control the volatility best. In this regard, I think it is best to look at both consumer price inflation and asset price inflation. Central banks have until now been looking only at consumer price inflation in determining interest rates. The new law requires the monitoring of asset prices as well. It could have been easily done by creating a department within the Federal Reserve to do it but our government seems to like more entities rather than fewer. But the underlying idea of having experts monitor asset prices to detect bubbles and instability is not a bad one.