Besides the extra thick outline that even if you set it at 1px it won’t become thin, it has a sort of x-ray that makes extra hard to position object that are inside other objects, you lose the notion of which one is in front:
Is the bike inside the rack?? very hard yo tell at first sight.
It would be nice to have the option to choose if you want outline x-ray or not.
Also let the outline become as thin as the user wants, because it doesn’t make any difference between 2px or 1px in the theme config (and it looks more like 3px)