Should the Body and Blood of the Lord still be shown for adoration in the traditional places, after the Words of Institution, when a Eucharistic Prayer is being used which defers the Epiclesis until later? For those determined to use such prayers and who would like an answer out of the older Western Catholic tradition: Yes! In 1912, Fortescue wrote:
"The whole consecration-prayer is one thing, of which the effect is the change of the bread and wine into the Body and Blood of Christ. During this Prayer we ask continually for that grace; although the Prayer takes time to say and God grants what we ask at one instant, not necessarily the last instant of the Prayer. So in all rites constantly people still ask for what, presumably, they have already received. Our Baptism and Ordination services furnish obvious parallel examples [Hunwicke adds: compare here Catherine Pickstock's words about 'liturgical stammering' and repeated beginnings and their basis in pre-'Enlightenment' orality]. The Epiclesis is surely also to be to be explained in this way ... the Canon is one Prayer. Consecration is the answer to that one Prayer. It takes place no doubt at the Words of Institution, but it is the effect of the whole Prayer. There is no sequence of time with God. He changes the bread and wine intuitu totius orationis'.
And in Cardinal Ximenes' edition of the Mozarabic rite, in which some 20 or so of the 200 Eucharistic Prayers have an Epiclesis after the Institution Narrative, the elevations always happen in the 'Roman' place.
I wrote that in 2004; I haven't reverified the last paragraph.)