You have to think of pds customer base as a sliding scale, one end bring all for arcade and the other being sim or die. As it stands at the moment, gt sits nicely on the sim side, but not to the far reaches of the scale. If gt were to go even more sim like, the casual gamers that play gt as an accessible racing game will be alienated and put off, as the game is now too hard for them. Go softer and the people who play it for the sim feeling are again alienated, as now the game is too soft. Pd have hit a good compromise with the gt games, and that's why they continue to sell games.