[Uncle Chip]

"The Sabbatine Privilege thus consists essentially in the early liberation from purgatory, through the special intercession and petition of Mary, which she graciously exercises in favour of her devoted servants preferentially... "[New Advent]

This is a heck of a lot more than veneration for her being the vessel our Saviour used to be with us. She now has the power to bring her believers to heaven.

Exactly. And more than just a co-Redemptrix.

[suzyjaruki]

in favour of her devoted servants preferentially

Mary shows partiality. She chooses based on her own preference! How can that be fair?