12 of the teams through are, as I said luck is a factor as well. I'd consider an element of luck for all of the 4 non top 16 teams that made it through.
Georgia got to play top seed last and they played their reserves, they were also given a dodgy penalty.
Slovakia pretty lucky to go through instead of Ukraine who beat them and finished on equal points.
Slovenia didn't win a game, pure luck.
Romania got an iffy penalty that saw them through.