I just read Katyal's just published NYTimes op-ed and he sort of addresses your question about turbo charging, moat. He designed the damn thing and basically is saying it's going a bit slow but it's working, turbo charging not possible. (And yes of course he has a vested interest in defending his product:). I will just note that the last innings of a baseball game can go on for a very long time!

Why Barr Can’t Whitewash the Mueller Report

We have a system in place for our government to uncover evidence against a sitting president. And it’s working.

By Neal K. Katyal Mr. Katyal drafted the special counsel regulations under which Robert Mueller was appointed.

Many who watched Attorney General William Barr’s testimony on Wednesday before the Senate Judiciary Committee, which followed the revelation that the special counsel Robert Mueller had expressed misgivings about Mr. Barr’s characterization of his report, are despairing about the rule of law. I am not among them. I think the system is working, and inching, however slowly, toward justice.

When it comes to investigating a president, the special counsel regulations I had the privilege of drafting in 1998-99 say that such inquiries have one ultimate destination: Congress. That is where this process is going, and has to go. We are in the fifth inning, and we should celebrate a system in which our own government can uncover so much evidence against a sitting president.

Some commentators have attacked the special counsel regulations as giving the attorney general the power to close a case against the president, as Mr. Barr did with the obstruction of justice investigation into Donald Trump. But the critics’ complaint here is not with the regulations but with the Constitution itself. Article II gives the executive branch control over prosecutions, so there isn’t an easy way to remove the attorney general from the process.

Instead, the idea behind the regulations was to say, “We recognize the constitutional reality that the attorney general controls the prosecution power, so what else can we do?” My colleagues and I (which included many career officials at the Justice Department as well as bipartisan leaders in the House and Senate) settled on two things. First, provide a mechanism to enable an independent investigation, and thereby generate public confidence in the outcome of that investigation. Second, design that mechanism so that if the attorney general interferes with the special counsel’s inquiry, that interference would be reported to Congress and ultimately become public [....]