Responding to the long-term updates (in the bolded), those are the ones I am fearing the most that will happen.
If the Endurance races are going to the "Missions" menu, you are only going to be able to earn the prize money once.
And you also don't know what type of reward it's going to be in the first place, if it's going to be 300.000 or lower for just a single ONE hour mission that you will only win once, it's going to be just a waste of time, or maybe you can enjoy the race but at the end seeing at the payout, you will be massively disappointed.
And it's not like most people will be repeating 24 hour races, but if the payout for a 24 hour race is less than several million credits, it's going to be an absolute insult to all of us.
And then the 2nd thing I am fearful... That the resale value of the cars in GT7 is only like 5-10% of the car's value. Which would be obnoxiously low.
One other thing about this I fear that will happen but shouldn't... Is that they are not going to allow you to sell certain cars that cost over, say, 1 million, or you can't sell Legendary Cars, something along those lines. Which again, is ridiculous since the cars are yours to do whatever you want with them, imagine wasting 20 million on a car to "try it out", not liking it and then being stuck with it (I won't do that but a lot of people will).
The payouts being increased to "on average" 100% what they are now, is not going to make much of a difference. 100% was what most of the payouts gave before 1.07.
The value of the 10-lap pit-stop races is aburdly low already, those would need a bump of 200 to 300% at least to make them viable grinds.
As for future cars costing more than 20 million. There's only a handful of those cars that cost more than that IRL, and PD is likely not going to model most of them anyway. So, it shouldn't be much of a problem, again, unless the payouts still remain ridiculous.