Exactly 2 players of the 15 who played last night both (a) started consistently for the 2019 LAFC team and (b) have been playing together in camp for more than a week. If you want to be generous you could call it 3.
The 2019 LAFC team was indeed an “all-time” team, as evidenced by setting the all-time record in points, goal differential, etc. We’re still waiting to see how good 2020 LAFC will be.