Ok, it took me a while to understand what the issue was here.
So, you are correct – Filmic by default will set the white and black points to depend on whatever exposure compensation is saved in the EXIF data in the raw file.
Specifically, it calculates an exposure bias by assuming a 0.5EV boost, minus whatever exposure compensation was dialed into the camera. This is nice if you used the exposure compensation dial on your camera to “expose to the right” to capture as much detail as possible, but it is not so good if you used the exposure compensation dial for artistic effect.
Fortunately, you can deal with this using presets. You can define an auto-apply preset in exposure module to switch off the “compensate camera exposure” option in exposure module, and another “auto-apply” preset in filmic to override the white point and black point adjustments.
Let’s say you set your exposure module to automatically set the “exposure” slider to “+1EV”. Then, in your Filmic preset, you should set your white and black points to be:
WhitePoint = 4 + 0.8 * ( +1EV )
BlackPoint = -8 + 0.5 * ( +1EV )
(substitute whatever default exposure boost you want in place of +1 EV in the brackets)
and since “auto hardness” is set to “on” by default, the output power is taken care of automatically for you. Save the filmic preset so it will auto-apply, and now your filmic module will no longer react to adjustments on the exposure compensation dial of your camera.
Does this address the concern?