Sorry for double post. but I got a solution to the tone mapper. Check it out !
Dissable Color Grading and Tone mapper completly or...!? - Rendering - Unreal Engine Forums!
Also I wonder if there is a sweet spot for setting up color grading and tone mapper to where we can get a default non tone mapper look and feel. so that we can still use the tone mapper in specific cases !
Has anyone actually attempted that here? playing with the post process settings in search for the sweet spot?