At Mercedes, its new floor appeared to have delivered some good potential, but there remains a degree of uncertainty about what we actually saw following Lewis Hamilton’s post-race disqualification for plank wear.
Meanwhile at Aston Martin, its latest developments were clouded by the team suffering major brake problems in FP1 that left it unable to get a proper feel for things.
It took the bold step of starting both its car from the pitlane, and even abandoning the new parts on Fernando Alonso’s car, to help fast track its understanding.
Haas also started its cars from the pitlane because it felt that the settings it had committed to after FP1 were far from ideal.
This is why all three teams will be hoping the more normal timetable in Mexico this weekend will allow them a lot more time to get to grips with the changes.
Here, we take a deeper look at the changes the teams made.