The key detail in the update is simple:
That is the sort of rule managers hate. A midfielder who breaks up play, or a full-back who defends aggressively, can become a selection risk if already walking a disciplinary line. At a World Cup, where margins are thin, one missing starter can change an entire tie.
The report says yellow cards are expected to be cleared at two points in the tournament:
That reset is crucial. It reportedly means two yellows collected between the round of 32 and the last 16 could rule a player out of the quarter-finals. But a yellow in the last 16 and another in the quarter-finals would not, under that system, carry into the semi-finals because the count would then be wiped.
Red cards appear to be more straightforward, and more severe:
That leaves a clear takeaway: by the time the knockout rounds arrive, discipline may matter almost as much as form. As the World Cup approaches, this is one rule worth watching closely - because one mistimed tackle in June could decide who is available when the pressure peaks.