I have never had scallops but i have seen a very thin skin piece(v-loop also) with them and the guy who wore it swore that for skin units it was a god send when any lifting occured compaired to a straight line,which he felt drew attention to the hairline when it lifted.
I suppose it all comes down to preference and what makes you comfortable.
Regarding the touch ups John ,i asked this guy used how he overcame this problem and he said to just brush a little glue on the skin and place back down with no problems.