Deacon Dennis Jebber, of the Melkite Greek Catholic Church, assisting in the celebration of the Divine Liturgy
"In three places, Vatican II uses different terms to describe what it intends to do when it speaks of the diaconate as a stable rank of the hierarchy of the Church. Lumen Gentium 29b uses the notion of restitutio, Ad Gentes 16f uses that of restauratio, while Orientalium Ecclesiarum 17 employs instauratio. All three connote the idea of restoring, renewing, re-establishing, and re-activating" (pg 65).
I think this means today's diaconate is not merely restored, but renewed and reactivated, an animating force in today's church.