I am working my way piece meal through a borrowed copy of Lazlo Dobszay’s The Restoration and Organic Development of the Roman Rite.
Here is a blurb:
"The turning around of the altars, celebration versus populum, was not commanded by the Council. In practice, however, the new rite and the new position of the altar are closely associated. We may say that changing back to the the original direction will have a beneficial effect. Indeed the very fact that the bulk of the clergy protests with intense emotions against this return shows its serious necessity; the principle motivation behind the protest is not pastoral care of the faithful, but the psychological distress of the priest. (p. 93)