The important change to make to our currency is to bring it back to a standard of weights and measures, as the Constitution requires. But the problems with the FED extend beyond their simple ability to print money without backing.
The other big problem with the FED is that they print this money with no oversight, no rules, no accountability, and no disclosure. This means they give whoever they want however much money they want whenever they want, and nobody knows it's happening. It's absolutely atrocious.