I have never written fanfic or the more tenuously linked expanded universe stories... do you find readers comments of [Si Vis Pacem Para Bellum] are more prickly than [Schwarz], or more or less the same?
1) Stoory is a Fanfic, wich inherently have a minus, - you need to be familar with the main story. If you are familiar with it (you know at least main characters) you are OK.
2) MC have no idea who Naruto is and where the hell she is. Wich is wonderful in my opinion.