Currently under the Constitution, Congress cannot create, modify, or eliminate executive departments, including those already created by Congress in the past; only the president can. This amendment will fix this problem by also giving Congress to ability to create executive departments with officials appointed by the President.
It is a problem, though? Cabinet departments are part of the Executive Power and at the discretion of the President, allowing for a centralized yet efficient system in which, as far as I know, there really hasn't been much (if any) need for Congress to meddle in. I should further note giving such wide powers to Congress when it comes to the Presidency would mean that Congress would be able to terminate existing executive departments (and indrectly fire a cabinet officer) against the will of the President, which is just asking for Constitutional trouble along the line.
I suppose it is kind of strange considering my favorable view towards several instances of reform, but this does seem rather unnecesary at a first glance. Why would it be a problem for Congress not to have such powers?