How would the criminal justice system be different today if the founding fathers had decided not to create a separate system of federal courts and instead allowed federal laws to be enforced in state courts?

How would the criminal justice system be different today if the founding fathers had decided not to create a separate system of federal courts and instead allowed federal laws to be enforced in state courts?Why the dual court system? What are the benefits? What are the constraints?Please provide citation and reference to sources. Quoted language must be put inside quotation marks and does not count toward the minimum word count.