That is related to the issue I talked about earlier, that of determining the reasonableness of someone's actions. The reason why the person has difficulty evaluating the degree of force may make their actions unreasonable. It may be a matter of racism or something similar.
The wording you suggested is pretty general. It can include elements that are not currently included, but it can also include other elements. That depends somewhat on why the person is unable to evaluate the degree of force properly.