What I find amazing is how many people are just repeatedly acting like the it's an objective opinion that stuff needed to be cut. Phrasing it like "trimming the fat" as though that content is less valuable or was harmful, when that content specifically missing is what people are disappointed with . It really does show it all.
I believe everyone knows this game is going to sell and make back nearly all of its budget at launch. Most of the people disappointed don't want this to be a runaway success after that good launch because they don't want this to be the direction of the series. And you know what's more amazing or rather increasingly frustrating as time goes on, despite a lot of these people not caring about online races at all, I haven't come across a single person yet (I could have missed it, I'm only human) that wanted the online portion to be cut out at the expense of the SP just because they don't care about online whereas the same cannot be said about the defenders of this game in question who more often than not basically end up coming off as "it doesn't matter to me, so it was absolutely the right thing to happen, and others should feel the same or get out"
Also, you can separate the individual components of the game and list out it all you want, same can be done for other GT games in their respective timeframes and could be a bigger list.
Most of the stuff listed is what's expected of a game like (high quality cars, hdr, 4kcb, sound) this in this day and age, it isn't something extra special being accomplished. It also doesn't change the fact that the bulk of the car count is really padded up via different class variants of the same car, basically lots of double and triples. It also doesn't change the fact that out of those 150 missions, a lot are as simple as the really basic license tests like accelerating and braking, and teaching you how to act online. Some are small timed trials of sections of courses which could be as simple as performing a turn within the given time etc etc.,
And again, you seemingly love to go "but what if they add this after" or "what if they add that after" that when PD has made no such statements about expanding or bringing stuff like career back after the game launches. People are right in not giving them the benefit of the doubt. They had 4 years. it is clearly a deliberate decision why they didn't add in a traditional career mode, and if they were planning on adding one they would've talked about it like they have about the cars already. Especially with their recent, very misleading PR-damage control they've been trying to do in regards to the campaign and offline content. Car count and track count increasing, sure, can be expected, but even that's not confirmed to be free at this point. Just that there will be no microtransactions like GT6 that allwoed you spend cash to purchase in-game credits.
The notion of "give them a chance, they could add it later" is a really dangerous one. You reward developers by purchasing a game for what's there at launch and if they have a good track record, what they've promised to release shortly after launch, not on hypotheticals.