ATC starting descent too early

Sounds great I apparently missed this option. How do you request higher clearance?

Even so, if you’re flying a known departure or approach (chosen via the procedures interface) the sim knows exactly where you’re supposed to be in real time and should therefore be able to assess what minimum altitude needs to be maintained it would seem. That seems quite simple to pull off you take a 1000 meter pathway and assess the highest elevations involved then add a safe minimum altitude. I don’t get why this is such a challenge.