S2, in my opinion, is not just a "restart," but more like a rhythm reconstruction.

If S1 is about bringing people in, then S2 begins to filter "who can stay."
All bonuses are reset to zero, which seems brutal, but in fact, it is wiping out past luck and early dividends, allowing everyone to speak again through "behavior."
Whether you grind hard, stay stable, or can continue online, these start to become the core variables.