I often hear about post-metaphysical theology and I confess that I still find the suggestion a tad confusing. Here are some wise words from John Betz that express well my concern:
[Metaphysics has] a regulative function that keeps Christian discourse (first and foremost of the incarnate Logos) from degenerating into mere mythology or, what amounts to the same thing, simply the ‘language game’ of this or that community. … [W]ithout a theological metaphysics, the transcendent perspective, which metaphysics holds open, threatens to collapse into the ‘way of speaking’ of this or that ‘faith community’. … [Metaphysics] serves to safeguard the transcendence of God who dwells in unapproachable light’ (1 Tim 6:16)
John R. Betz, “The Beauty of the Metaphysical Imagination.” In Belief and Metaphysics, edited by Peter M. Candler Jr. and Conor Cunningham, 41–65. London: SCM, 2007, p. 42.