From Ammoland:

HR 3960 effectively scatters the functions of BATFE across the entire Department of Justice. We could very well see some provisions kicked over to the FBI. Others could go to the United States Marshalls. It would likely be harder to keep track of every function. It could very well depend on who the attorney general is. For a hack like Merrick Garland, it is a huge chance for mischief, to put it mildly.