Regulators crafting plurality? Not likely.
A difficult task indeed, especially considering that it was the financial regulators who exercising some not so transparent powers over the markets, were responsible for putting dampers on plurality, with their creation of some truly mumbo-jumbo minimum capital requirements for the banks and the empowerment of the credit rating agencies.
If you want plurality in the market you need to start by stimulating plurality among regulators. Anyone wanting to defend the free markets but that does not realize how imprisoned they really are, is not an effective defender of the market.