Hopefully, Lucina will have some special moves that set her apart from Marth. Then again, I haven't played enough Fire Emblem to know their differences.
There really aren't enough differences between their move sets to set them apart from the clone category. Her UpB is like Marth's, but slanted?
Oh instead of up lets make it tilt, great idea guys. Same with the flurry of moves like Marth without the flashy colors in sideB.