Mary is the Greatest Intecessor!!!
Sorry that title is reserved for Christ alone:
Romans 8:34; "who is the one who condemns? Christ Jesus is He who died, yes, rather who was raised, who is at the right hand of God, who also intercedes for us.
This verse clearly teaches that Christ is the greatest intercessor, by the virtue of his death on the cross and the fact that he is at the "right hand of God", the position of power.
Romans 8:26-27 clearly shows that the Holy Spirit also intercedes for the beleiver. So the path is - Believer -> Holy Spirit -> Christ -> The Father.
I think what is happening here is to elevate Mary to the position of God... i.e. Greatest Intercessor - Sinless - forgiving sins. In other words deifying Mary, rather than seeing her as an exceptional believer which the scripture clearly indicates.
If Mary is sinless, and forgives sins, then there is no need for Christ's death on the cross and that would be another way to heaven bypassing Christ's attonment.
But Christ said (John 10:1) "Truly, truly, I say to you, he who does not enter by the door into the fold of the sheep, but climbs up some other way, he is a thief and a robber." and (John 10:9,10) I am the door; if anyone enters through Me, he will be saved, and will go in and out and find pasture. "The thief comes only to steal and kill and destroy; I came that they may have life, and have it abundantly."
God alone is worthy of our worship. Christ alone is worthy for redeeming us of our sins and giving Eternal and abundant life to the believers . The Spirit alone is worthy for interceding on our behalf, and the Father alone is worthy above all.
If, Mary, were looking down from heaven above, and I believe she is, she would say to you all to worship God alone and not her. For she says "and my spirit has rejoiced in God my Savior" Luke 1:47.