Cars and tracks are now the domain of paid DLCs, not updates. That much was made clear some time ago by Kaz, also on Twitter.
Other than that, I have no thoughts because most of the previous updates have been almost random in what they add and/or fix. Half of them have even broken things so I'm not exactly that eager to install any new patches.
As for the connection problems, maybe I'm wrong but I think they will be a permanent feature of GT5. The way the game does online, particularly in private lobbies, is abysmal and it would take a hell of an update to completely change it. Spec 2.0 would have been the ideal time, but unless we get another massive update like that I don't think we'll ever see any improvement.