The Novus Ordo isn’t as much like the early church mass as one might think.
First off, EVERYBODY faced east, including the priests. There was no versus populum mass.
Second, some of the Deacons guarded the doors to watch who entered. They only let baptized people in the room. Anyone else was left out.
Speaking of room, it was not just “around the dining room table” as some might say. Houses back then were rather sizeable and included courtyards as well an assembly room. They would have the liturgy in this assembly room, and they would “convene themselves modestly in the places of brethren” and “in a manner pleasing and ordered with care.” Harley what I would call informal.
The men and women also were separated from each other, and if one was found not sitting in his proper place, the Deacon would “rebuke him, and make him rise and sit in his fitting place.”
“Likewise, the Deacon ought to see that there are none who whisper or sleep or laugh or nod off.” There’s a lot of that going on in Novus Ordo Churches today!
All these quotes (one of them is modified to make grammatical sense) are taken from Didiscslia, a document written around 250 AD.