If she did that she'd be really selfish. What about all the experiences they all had and the people they met. Sure it wasn't all happy times but I think none of them would like to loose that. Fortunately for her, nobody would know about what she did (they'd never speak to her otherwise).
Not to mention that following the entire manga would've been kinda pointless.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"