You shouldn't worry about the charge, everyone's is different. I know this isn't an iPhone, but some iPhones come with NO charge at all or half.
You're probably gonna be looking at the glass on the iPad a lot more than the aluminum, so i say just deal with it or try to get it swapped.
Yeah, scratch didn't bother me a whole lot. But I was pretty sure everyone had 100% to start. Seems like a bad way to start off this iPad...