This. Also, Vettel would never have won that race if the weekend had stayed dry. I also doubt he would have won if Hamilton had qualified himself well into Q3.
Absolutely, as to Hamilton. It's become a bit lost to memory that he had a couple of duff weekends in the last third of the 2008 season, and Monza was one of them.
F1 is and should be a cutthroat business and if a driver have 2 seasons and fail to deliver his employer, then I do not see any reason to find the driver being treated unfairly. I would actually want a lot more drivers dropped, since as someone posted above there are hundreds of drivers equally talented as the bottom half of the current grid.
Di Resta - We know what he can, what he can not and what he brings. Give someone else his seat.
Sutil - We know what he can, what he can not and what he brings. Give someone else his seat.
Massa - We know how good he used to be, he is not anymore and there is no reason for a team to take a chance on him.
Chiton - We know what he can, what he can not and what he brings. Give someone else his seat.
Van der Garde - We know what he can, what he can not and what he brings. Give someone else his seat.
Agreed, especially the cut-throat approach. Apparently that was Newey's argument for getting rid of Buemi and Alguersuari. I wouldn't retain any of the drivers you named but would differ with you only in arguing that Massa was always overrated. My recent watch-through of the season 2008 suggests he was as error-prone then as he is now and only got into a position to win a WDC through Hamilton's mistakes (including Hamilton's ruining of Raikkonen's race at Canada).
Also enjoyed the (intentional?) misspelling of Chilton. The amended version is an accurate summary of his skills.