we have a long discussion here : Eye adaption has been removed - #78 by MichaMMA where we agree that the effect is lowered, but still exist and is realy notiable (e.g. see my screens). Some users like the old eye adaption, some like the new one.
Result: the wish to makes this feature per slider customizable and/or let enable/disable in menu is still valid and seems for some users more important.