It only changed because Whiting claimed the FIA race tracking software had problems with lapped cars. I never bought it at the time, it's another example of changes being made for the show.
It's surprising how often the FIA has problems when computers are involved. They must be using the same experts as the UK government.
Just as the flag marshals told them when it was first introduced but I guess the 'nanny knows best' rule appears to trump common sense.
I doubt it has improved a great deal since, given the way Masi/stewards recently started handing out blue flag penalties apparently at random.
One thing I would like to know regarding their '3 blue flag' rule is, what constitutes a 'blue flag' in their definition? - is it a proper blue flag shown trackside, a blue light panel or a combination of both - as often the flag points and the light panels are at different points.
Given that a driver appears to get 2 or 3 licence points for blue flag transgressions, I imagine that the back of the grid teams would see a variety of temporary replacement drivers during a season if they reverted to the 'leave them in the pack' system.
I have no objections to reverting to the old system. providing they sort out (abolish) the blue flag penalty system - the main problem with which is that the places where the flag points are closest together are those where it is the most difficult for the slower drivers to let that the faster drivers past, even more so if they are in a big mixed up pack all closed up after a SC restart. Though I guess the chaos at places like the first few corners at the Nürburgring or Sochi might be entertaining - that is until they have to bring the SC back out to clear up the resulting mess.