About the pit stop, was for safety.
In other words, if they didn't make a pitstop and the tires exploded what would you have said?
I agree with Ferrari this time,they did the best choice for Sainz,sure he would have been second as he would have passed also Hamilton with the pace he had but I am sure he would have had a puncture if he kept racing at that pace or if he would not get the pace the tire would degrade surely in the last 10 laps and everybody else would have surpassed him again.So Ferrari did for once the right call with Sainz,they even got the fastest lap of the race.
Leclerc made the mistake exactly where he needed the most not to do it,now Verstappen 62 points ahead and when Leclerc loses Verstappen extend the gap with minimum of 15-25 points,when Verstappen loses Leclerc closes the distance by just 6-12 points and this says a lot for the title fight.I agree that in 10 races is almost impossible to close the gap by 62 points unless bad things happen to Verstappen.