Everyone I’ve known who affirms the Days of Proclamation interpretation would say that all of God’s creative proclamations were completed by Yom #7. No disagreement there. So I’m not clear why Genesis 2:1-3 would pose any problem. Moreover, because God is sovereign and is not bound by the time dimension which he created, when God commands, he doesn’t have to wait for the results of those commands.
I assume you are familiar with the idea that a transcendent God does not experience the arrow of time as we do. God’s omnipresence in the time dimensions is similar to his omnipresence in our three dimensions. For God, the idea of “now” applies equally to all points in time. (That’s why the scriptures state “I am the God of Abraham, Isaac, and Jacob” and not “I was the God of Abraham, Isaac, and Jacob.”) God could declare the creation “very good” without having to wait for the land and the waters to “bring forth” because God could directly observe every eventual realization and ramification of his creative act without any sort of delay. Yes, the Bible often has to communicate difficult concepts using anthropomorphic language which finds analogies in our human experience—but we should never forget that God is not restricted within any of the dimensions he created when he made the matter-energy universe.
I never really grasped this aspect of God’s transcendence and omnipresence until I had studied enough physics to appreciate Einstein’s relativity theory. I find it amazing that even humans routinely and individually experience the speeding up and the slowing down of the river of time. For example, when I take a flight somewhere, the higher altitude takes me further from a large mass, the earth, and so time literally passes more quickly. Indeed, these “Einsteinian” differences in time passage would quickly render GPS devices shockingly inaccurate in a matter of hours—so engineers must reset/correct GPS time clocks on a daily basis. Whenever I think about this application of physics, I’m reminded that I’m a time-bound “passenger” on this river of time but God is not (because God is not material, among other reasons.) To God, his observation of August 10, 2017 is no different from his observation of 33 A.D. or 2000 B.C. And when he speaks to us in temporal terms using chronologies and verb tenses, it is entirely a concession and accommodation of our human perspective of time, not his. To God, every point on the timeline of human history is equally “now”.
Of course, if Genesis 2:1-3 clearly defied the Days of Proclamation view, all Christians with a high view of scripture would reject it. And even though it is not my own view, I greatly respect the Days of Proclamation perspective for being a reasonable way in which Christian who prefer a very literal interpretation of Genesis 1 can avoid the many logical, scriptural, and scientific conflicts inherent to more traditional Young Earth Creationist interpretations of the passage.