I'd take little things at this point, like changing more standard models over to premium models. I mean, PD has to be updating graphics for the new game, would it be hard to sprinkle a little of that love towards GT6? I don't know, I'm totally ignorant when it comes to programming.
I was pretty bummed when the seasonal events began to be updated half as often as they used to be. It would be different if there were a lot more seasonal events released, but that hasn't materialized. The seasonal race events are fun for a few days, but I mostly just use them to farm credits when I need a few million. I don't get into the drift events, so recently I've been doubling down and really pushing myself on the time trials instead of stopping once I achieve gold. I dig the competitive while cooperative spirit in the community around those events.
I've been thinking about finding a club or league, or maybe just making a point of hosting a good clean room, because this late in the game it will be the community that keeps things alive and interesting. I'm not counting on PD to maintain any sort of freshness for us. Not really blaming or hating them, it's just a natural progression through a product lifecycle.