As all people probably know current Auto Exposure feature produce way to overexposured images. Even on all YT video people always reduce it value by -0.5 or more. I think that this -0.5 value should by default in internal algorithm so we can go further to values like -1.5. Currently -1 is max.
I found that difference between Exposure = 0 and Auto-Exposure is exactly 0.35. This is why I think that this 0.35 or better 0.5 difference should be internally subtracted ( too looks the same ) and after that users will have additional 0.5 value to subtract from current -1.0 max negative value.