Classic error with 3D platformers is to have a curved stair case, have the camera pan to side on, which denies the view to control the x axis relative to the character and the staircase, also the distances of jumps and edges are harder to determine. Super Mario Galaxy, top 5 3D platformer for me, made by some of the best devs in the world, has this kind of error a lot (I’ve played that game a lot, 242 stars). If I was controlling the camera, I would never place it where the developers place it, it would be over the shoulder where it would be in almost all situations in a 3D platformer. If you pan out like that in a 3D platformer, turn it into a 2.5D platformer like Giana: Twisted Sisters or Trine, so you can only control the character on one axis.
All these kind of errors are never to serve gameplay, they’re always to show an environment, or to make a game like a movie. Games are not movies, they have strengths that movies don’t have, they shouldn’t pretend to be movies, whenever a game developer tries to make a game more like a movie and forgets gameplay the game suffers. If your environment is interesting, you won’t need to force me to look, if you want me to view an environment from a particular angle, find a way to get the character there, the original Tomb Raider is great at this, you view an environment from one angle but you get a completely different idea from another perspective without removing the camera from the player.