Might I ask for a source on that? As far as I can see the only change after Vatican 2 was the name of the mass from "missa privata" to "missa sine populo". In general there needs to be at least one server to assist the priest.

Check Cannon 904, 906 and in the GRIM 254 

As for what you are mentioning below, are then saying the mass celebrated by monastics, cenobites and the desert fathers were/are invalid?

The two great commandments are in a way related but they are not the same, it reduces God to some new age pantheistic formless force, that has no personality except what we collectively and subjectively feel at the time. 

As for communion, I would say that it is far more communal in the old mass, here the congregation doesn't waddle awkwardly in line to get their personal serving when receiving. In the ancient mass we come to adore and receive the lord together at the altar rail. I take communion with my wife and friends next to me as we are given in equal form and method.