Ask Donnced, Imari, and pretty much any other member of the community and they'll tell you that they wish there was more DLC. Me, I'm just sitting here wondering why it's magically OK for devs to lock content behind a paywall when they've already got it ready to go on day one.
Look, I'll be honest that I'm not a big fan of how day 1 DLC works. I understand that technically it's in the developer's best interest to sell the game with as little content as possible, and then charge extra for as much as possible, but it feels a bit dirty. Then again, there's lots of commercial techniques that I find a bit dirty, so I just vote with my wallet and don't buy them.
On the other hand, post-release DLC is win:win. This is stuff that the devs could not have gotten into the game on release. That means that the first you're going to see of it is the next full release. Some people like to make the argument that DLC should be free, and I agree that it's nice when it is, but devs should be paid for their work.
I'm totally fine with post-release car and track packs. They're usually overpriced, but that's how DLC works. You pay a premium to get the content early, or you wait until the next release and get it cheap. While I like what Polyphony did with free DLC and I think it was a good move because they needed to generate some goodwill, I think they also missed out on a lot of money by not having post-release paid DLC.
The thing is, even if you never buy any of the DLC, if Polyphony makes more money then that's potentially a bigger budget they'll have for the next game. That's of benefit to everyone.
P.S. To be honest, I buy very, very little DLC as it is. I buy the AC stuff when it's on special, and I'm thinking about buying the Witcher3 DLC at some point. I got a GridAS season pass on special, I bought the Shift 2 Legends pack, and...that might be about it.
Mostly, DLC just isn't worth the money for the fun that I'd get out of it. If GT6 had paid DLC, I almost certainly wouldn't have bought it. I still think they made a mistake by not having any though.