We have a direct line to God, we should pray directly to him only. How can Mary and the other saints pray for us when they are asleep in Christ?
I don’t mind considering that
“Today you shall be with me in Paradise” meant in every fully conscious sense.
And, there have been plenty of Heavenly visitations, such as Joya has linked to, which clearly indicate that folks are busy about the Master’s business there—worshiping, teaching aborted infants who are growing in the knowledge of The Lord, etc.
None of such visitations I’ve EVER read has included any hint of Mary doing anything else but the standard sorts of things a graduated Christian believers would do. No special office; no special duties; no special honors—certainly no QUEEN OF HEAVENSHIP.
And most certainly not listening to, screening and prioritizing prayers for The Father’s consideration. What blasphemy that would be!