If you're bored with all the existing tracks already I can't imagine adding a handful of new tracks is going to do much to help that. Maybe consider you're just bored of 'vanilla' racing games in general?
Some players play games like completionists, they want to unlock stuff or at least beat stuff. For them the game is done when everything is gold. And this can be done quite quickly by a decent driver (or a dirty driver who knows the best ways to bump into cars). Having more content is needed for them.
GT League added something, but its severely lacking in content.
- 2 Pro leagues is by far not enough. You surely want to have some more higher end races.
- Not enough variety within single brand races. 2x a roadster, a clio and tt race? What about races dedicated to a skylines, the f40 etc? There is plenty of cars with good status
- No difficulty setting? With the current AI difficulty and quality they surely could create some harder versions of these beginner leagues. That way they also could have avoided having 2x the roadster league. For difficulty they could have given the other cars some additional HP and reduce their weight to improve their speed. But this all seems to be lacking. Its bad when in the 2nd lap you already manage to reach first place with 4 laps remaining. Its not going to be an intense race. Its good for beginners, but at least give the better racers some chalenge they will like.
- No rally races.
- No tournaments?
Even for drifting i find the content lacking, its always the same section, yet some tracks have a lot more places suitable for drifting. Previously you could at least set the event to full lap. There should be done something here to allow more drift options. Those 2 turn events are too quickly becoming boring to me as its just a restartfest.
And what about the weekly chalenges that GT6 had? Use X car, reach X time to unlock a car. It doesnt even have to be a car on that, either extra credits or miles would already be a nice bonus, and give a perfect 'online' chalenge for those who dont want direct PvP.
For a completionist this game lacks a lot, and once done and lacking new content for weeks, they can quickly become bored.
Im at only 35h of driving (and 40 hours of livery editor with it), and i already see that there lacks a lot of content.