This is an interesting and well presented post from Catholic Analysis: Christ towards the people.
I do think clergy of the "Good morning, everyone" .... "Good morning, Father" mold would do well to read it. Those of the lay faithful who try to be devout, particularly in terms of trying to get to Mass on a weekday, are not going to Mass because they want to "see Father". On the contrary, they are seeking a meeting with the Lord. Please help us by celebrating with the same kind of purpose: "The Lord be with you" does very nicely, thank you.
If you read Catholic Analysis' post you might be able to see in it (though the post does not make it explicit) something that is common to both ad orientem and versus populum celebration, when both of them are correctly understood. What is common is an underlying meaning of facing towards the Lord - in the former case, the "Lord who is to come" at the end of time and in the latter case the "Lord who is to come" on the altar at the moment of the Consecration. [One could perhaps argue that the ad orientem celebration contains both senses of facing towards the Lord, but I think one is more transparent than the other.] There is no contradiction between the properly understood meanings of both orientations - in fact there is a "mutual enrichment".
The singing of the Sanctus seems to me a particular moment in the Liturgy that expresses this orientation towards the Lord and, during versus populum celebration, should be a moment at which we (ie both priest and lay faithful) particularly focus our attention on the altar and on the bread and wine that will soon become the Body and Blood of the Lord.