If your superfat is at 7% then the lye will be all used up by the time your soap is cured. It won't make any difference to the lye if you raise the superfat any higher.
I'm inclined to agree with the others that your soap is too cleansing to the skin. The use of coconut oil in particular can be irritating to some people's skin. Don't know if you are using coconut oil, but I thought I'd throw that out. Some people also react to butters (sensitivity to shea butter seems to be common).
A full recipe -- fats, lye, water, fragrance, and any other additives -- all in weights, not percents -- will get you better advice than talking in general like this.