No, the President already has that power. The norm of the previous institutions was, largely, to let the agencies do their thing. This administration is not going to do that.
This was a live question in Trump's last administration, but I don't think it is anymore after cases like Lucia?
Great analysis. By your logic you don’t think that the Enabling Act of 1933 was a power grab, correct?
You are dying on the hill of a pedantic point. A president also has the power to declare an emergency and deploy the military domestically. Doing so would still be a power grab. The term just doesn't have the precise narrow definition you seem to be arguing for. Its colloquial understanding encompasses the use of heretofore unused powers.