I have no opinion or biases one way or the other as to either the creation of the monument or its size. However, I do applaud Secretary Zinke's recommendations to get Congress much more involved. In fact, repeal of the Antiquities Act, which gives the president too much power, should be considered.
Under the Constitution, Congress is the policy-making branch of government except as to Foreign Affairs, but even there his power is restricted by his duty to submit formal agreements with other countries to the Senate for ratification — a duty much too often neglected by presidents of both parties through mere sophistry.
Major decisions as to public lands like other policy matters should be made democratically not by an undemocratic fiat. The president may propose of course, but he shouldn't have the power to dispose.