Importances are ratio level data, so they can be added and compared. So . . .
. . . you could say that D-F are not as important as A or B, for example, but they are relative to A and B and are not absolute measures (e.g. they might be extremely important, but still less important than A and B).
. . . You could add D+E+F together (at the respondent level) and then take a mean of that sum and see how their mean compares to the means of A and B you show above.