Michelin claims the tire can be used for 10 laps if it was used at top speed on the 13th turn. So if the dirvers wanted to use it at top speed, they can change it for every 8 laps, or like I said, drive slower. And no, they can change tires, as long as using the same branch. F1 changes tires all the time at pit stops. However, the rule states they can't change to different branch of tires.
Again, no, you guess wrong. I'm no happy about the race, so I said "What a joke". And no, I'm not a fan of any F1 teams, I just do some researches to understand the whole thing. At least, I know they can change tires during the race.
Michelin never complained when they had advantage on other speedways and won all the races before US Grand Prix. And when they have one disadvantage on one race ( need to drive slower on one turn ), they want the rules to be changed so they can still win.