Yeah... no. That's a pretty big copout for the shit she's pulled.

She defeated a powerful dark jedi of whom had trained for SEVERAL years with a weapon she'd never used before (while he was wounded btw, which is a good thing for him), she'd not once ever tried to attune herself to the force yet somehow knew how to use force abilities, she racked up more than 10 kills in the Falcon turret on her first time using it (starting off with a triple kill with one shot I might add), shot a stormtrooper from a good distance with a hand blaster she'd never used before he did, ultimately "wow'd" Luke with her force aptitude having had ABSOLUTELY ZERO TRAINING IN IT.

But yeah no, totally reasonable and plausible character that in no way feels like a self-insert fanfic.