The Classic Le Mans circuit is a world away from the modern circuit. It will have been created from the ground up, such are the differences so please don't talk nonsense.
As for the Season Pass, complaining about unknown content not matching your expectations is a bit silly. If you're the type of person that doesn't like a Season Pass then don't buy it, don't gamble on something you don't know the content of. Some people look at it from a money saving aspect, since the season pass was cheaper than buying the packs individually. Some people buy it to show support for the devs. Given that you already got over 180 cars and 64 circuits (many with multiple layouts) in the base game, you can't say you aren't spoiled for choice already. What would you have the developers do, delay the game for another year whilst they add in all the content they want to bring, increasing the cost to you, the consumer, to the level where you won't buy it? Or, as is the preferred option, release it with a shed-load of content, at a price that will at least be half-palatable to the average person, and then add the extra content later for people that want to buy it.
As with all things, if you don't like the extra content, don't buy it. If you don't want to gamble on a Season Pass' content, don't buy it. But buying a Season Pass 'blind' and then complaining that the content doesn't satisfy, well, you only have yourself to blame for that.
And for the record, again, I do not work for SMS and have never been employed by them. I only say this because some people have got the impression that I do work for them and so I don't want this post read as some kind of "look at the disgraceful way SMS responds to its customers" drama.