Frankly, we ended up with the cure AND the disease. Special purpose entities were used by Enron to muddy up its accounting so nobody could tell that it was doing stupid deals to hit its quarterly numbers and wasn't really making any money, and then they were used again during the real estate bubble on an even wider scale to mask the risks of the mortgage origination machine (with convenient help from the bone-headedness of the ratings agencies). So the "cure" really didn't seem to help the disease very much.
Instead of dumping a bunch of new reporting requirements on everybody, it should be pretty simple: increase the amount of equity capital that needs to be held against debt (i.e. force a decrease in leverage) and change the accounting rules so shit that could blow up the company by some mechanism has to show up on the balance sheet. However, the current system creates a lot more work for lawyers, accountants and bureaucrats so it seems unlikely to be simplified anytime soon.
Instead of dumping a bunch of new reporting requirements on everybody, it should be pretty simple: increase the amount of equity capital that needs to be held against debt (i.e. force a decrease in leverage) and change the accounting rules so shit that could blow up the company by some mechanism has to show up on the balance sheet. However, the current system creates a lot more work for lawyers, accountants and bureaucrats so it seems unlikely to be simplified anytime soon.