Wow this is bad for a brand new bag!
Personally, this would bug me as I want to be responsible for all the scuffs on my bags, but if you are okay with it, then keep it. The color is so light, it is bound to happen.
I'm not a fan of coco handles so I'm not sure how scarce they are. Could your SA try to locate another one? Last season there was a slight defect with light beige flap I've ordered and I was told they won't be able to get me another one, but at the end they did. So maybe it's worth asking your SA?