I agree that part is the more substantive change, but OTOH it seems reasonable to me: Why would the president have less oversight over the regulatory acts the bodies he nominally (and constitutionally) supervises than he has over the laws passed by congress, by virtue of them passing his desk on the way to becoming law?

It might not be a wise change for him or his party, given that all changes to the practice and structure of government ought to be viewed through the lens of your worst opponent wielding them...