There is no contradiction between the hierarchical structure of reality and the immediate constitutive presence of God to all things.From Theophany: The Neoplatonic Philosophy of Dionysius the Areopagite by Eric D. Perl.
…Thus all things, at every level, participate directly in God in the manner appropriate to them. Therefore the hierarchical structure of reality, far from separating the lower orders of being from God, is itself the very ground of his immediate presence in all things. Every being participates directly in God precisely in and by occupying its proper place within the cosmic hierarchy: stones by merely existing; plants by living; animals by sensing, humans by being rational, angels by being intellectual. It is not hierarchical order, but rather an egalitarian leveling, that would violate the immediate participation of all things in God by blurring the differences and ranks of beings which constitute that very participation.
…The view that hierarchical order separates the lower ranks of creatures from God depends on the mistaken conception of God as the “first and highest being,” standing above the angels at the peak of the hierarchy of beings. If that were the case, then indeed only the highest beings would be in immediate communion with God. But since God is not any being but “all things in all things and nothing in any,” he does not stand at the top of the universal hierarchy but transcends and permeates the whole. “The goodness of the Godhead which is beyond all things extends from the highest and most venerable substances to the last, and is still above all, the higher not outstripping its excellence nor the lower going beyond its containment.” The entire hierarchy of reality, therefore, from the highest seraph to the least speck of dust, is the immediate presence and manifestation of God, of unity and goodness, according to the different modes and degrees that constitute the different levels of being.
…Dionysius’ doctrine of analogous participation in God is thus closely parallel to Plotinus’ teaching that the nature of all things is their share in contemplation or intellectual activity (which itself is the manifestation of the One), so that the life of plants is a “growth-thought” and that of animals a “sense-thought.” The same principle can be found in Proclus, in the form of his well-known affirmation, “All things are in all things, but properly in each.” He goes on to explain: “In Being there is life and intellect; in Life, being and intellect; in Intellect, being and life; but each of these exists upon one level intellectually, upon another vitally, and on the third existentially.” For him, too, the less universal perfections are speciﬁcations of the more universal ones, so that, for example, living things have intellect “vitally,” i.e. in the mode of life, and intellectual things have life “intellectually,” i.e. in the mode of intellect.