Gosh, so many people saying "You are getting the updates for free so stop complaining...." but that is complete rubbish. This is not the 20th century for goodness sakes, and we are talking about PS3, the most advanced and online-capable gaming console the world has ever seen, and a budget bigger that that of many small countries to make the game.
No, the updates are not "free". They are paid for with the millions, if not billions, that the makers are receiving for this game. In this day and age updates are mandatory, as is an online component.
What the lack of a seasonal event so far this week has done is expose the lack of substance of the game. A-spec is deeply unchallenging thanks to the rubbish AI, B-spec is worse than pointless without the ability to train your driver (like the old Forza Motorsport), online racing is so hit-and-miss as to be unentertaining for many. The challenges were to be the saviour of GT, but without them, really, who cares.
Having bought the original Playstation to get the original GT when it came out, and having played every incarnation of GT there is since then, I can easily say that, unless they change the format drastically, this is the last GT I shall ever bother to buy. This game is way too shallow for amount of development and cash that has (supposedly) gone into it.