I'm pretty familiar with Article I.
Perhaps these "legal scholars" could point me to where Congress has the power to delegate its exclusive powers which arise from the fact that they are elected and are subject to removal through election, neither of which apply to "federal agencies".
Gorsuch has touched on looking at Chevron deference of courts deferring to a federal agencie's interpretation of statutes. I believe the Court is going to start to rein in Federal overreach in these areas.