It makes little sense to measure the temperature of the case.
At the initial stage, there should be no problems, it is very interesting what will happen to your laptop in 3 months. I'm sure the temperatures will increase if there is no additional cooling.
There is a seal but never got problems with breaking them
MSI also allows to change the cooler on desktop card an so on.. even if there is a seal, no problem.
Already got a new 1070ti on warranty. Seal was broken.
That the point why i only use MSI, Asus and EVGA. They dont care about.
In the summer, you can use a household fan for additional cooling.
Warranty services work according to a specific plan. When there are many warranty claims, the service center workers will pay attention to all the nuances.