Currently exposure is a property under Color Management in render properties.
I believe the exposure should be moved into a property on the camera. In my opinion, this would more accurately reflect exposure adjustments in reality.
Also, you could imagine working with one scene and having multiple cameras. One is an interior and one is an exterior. Adjusting the exposure by camera can save many key frames and discourage a common inaccurate method of increasing light strength for indoor scenes, as opposed to increasing exposure.