Yes, I think your instinct is right - if you brought it down to the scar it could look a bit unbalanced. If you keep it where it is but replace your thin Toppiky hair with nice healthy hair, that will look good. You could, either now or on a subsequent unit, bring the hair down a bit - I would say about halfway to the scar - without it looking unbalanced. Once you get your hairpiece you will be able to experiment by moving the hairline a bit forward or back to see how it looks.