Wait for the strategy to unfold...
That new floor was really helpful for Leclerc. Must have allowed him to setup the car a bit more to his liking and it's showing, even in tracks where he has been relatively weaker in the past (for example this is the first time he has outqualified his teammate in Interlagos).
Duchessa talked about how Ferrari had to be very careful in COTA to manage the PUs especially on charles' side and that they considered taking penalties at Mexico. So if they consider it at Mexico I'm thinking they would also at Brazil, since you have a very high % laptime on full throttle las Vegas coming up. Abu Dhabi also power sensitive
With this amount of lift off (almost 400 meters per lap) is not surprising.