I'm guessing you mean vertically tilt the viewport? Because you can rotate the camera in-game. It's just not a fully over-the-shoulder 3rd person game. Top-down games are still very much a thing. I hear Diablo 4 is on its way.
I do understand, and partially agree with the sentiment and wish though. However, most game series tend to establish a certain style that the majority connects that game with. I'm not sure if doing it differently for, say, Divinity Original Sin 3 would be a good idea. Or if it'd positively please more people than it'd upset. The game series 'Trine' is a 2.5d platformer puzzle game, and they tried changing things up in one game, and they got bashed for it. Bashed hard.