The proposal is a cabinet level director of all the snoops who has full control of the budget. This would give him the power to put people and $$$ where he deemed best. The National Security Advisor can only offer advice and carry coffee.
There's been inherent problems within the FBI for years. Outdated PCs, old and under powered mainframes, a "Good Ol' Boy" network that would have made any Southern sheriff's department proud 70-80 years ago. CIA has a legal problem if/when they run an operation in CONUS.