Kringle is correct. The change to the PM-Admiralty relationship contemplated by this amendment is clearly substantive, and it is one we have discussed before. For the reasons stated in that debate, I am entirely opposed to such a reallocation of authority away from the PM.
The proposed changes to the Cabinet section are also substantive, not stylistic. At present, the PM and Cabinet are separate institutions. The PM is the elected leader of the executive branch; the Cabinet comprises any ministers the PM chooses to appoint. Relegating the PM to being simply “another member” of the Cabinet diminishes their role.