The only reason i can see why people didn't mind Jason staying (i saw an issue with it as he stomped the race i wasn't there, and each race he was, he would get top 3 every race pretty much), was because in the end, he didn't win. even though, if he could have been at every race, he would have stomped it due to his car %.
The same will be for Sam, until he starts using his car % well. people will be like. yay ok, let him stay, until he just goes to pole every race and wins everything.
Sam's car is still way out infront of everyone else, like 10-15% ahead of everyone is pretty large margin to say he doesn't have a car advantage anymore. clearly he just hasn't used it right.