LOL, I had to look up modo proleptico and am still not sure what it means. But, I do understand the premise of your post and think it is an apt way to explain Mary. I have said often that in her, we see the promises of Christ to us all fulfilled.
So pro-lepsis "grasping before."
One way to talk about the Kingdom and the life of the Church between the Incarnation and the end is that it is "proleptic". The Future keeps breaking into the present.
This is not some kind of exotic concept, though the name is exotic. When the French underground in eastern France learned of the success of the D-Day invasion, they could draw strength from the way that success assured the coming victory. So they could fight more boldly. That's a kind of secular prolepsis.
The Eucharist is everything we usually talk about, but it is also a present instance of the future banquet in our Father's house. Prolepsis.
We look forward to sinlessness and to enjoying all the delights promised with the added richness of "spiritual bodies" -- "changed from glory into glory" as the hymn says.
Mary is a kind of token of that future promise. Not only does he promise this gift to all, but he's already given it to Mary.
I have said often that in her, we see the promises of Christ to us all fulfilled.
Yup. Praise God!