Is it in the literature that metaphysics is merely a chosen groundwork for conceptual truth? For instance, words like "meaning", "morality", etc. all tacitly presuppose a metaphysical edifice erected within the mind?
I would say that metaphysics is of paramount importance and is the foundation of philosophy for without it - without a coherent worldview - we would be hopelessly lost and helpless to deal with reality. We have to have this groundwork and the axioms that accompany it. Reality exists and is absolute. That is, I don't accept the premise that reality is all just an edifice or rather, that reality is all in the mind. There is an objective, physical reality that exists outside ourselves and we better learn how to deal with that reality (or suffer the consequences). Metaphysics provides that foundation.