The stat weaknesses and strengths aren't big enough to really matter. YOu'd probably never notice one was stronger and one was weaker if you didn't set them yourself.
Level is not a good measure of strength in this game. But yeah, she's one of the three "Best" characters. Everyone should be using her, Chrom, and the avatar.
Post-Chapter 13 spoilers:
is absurdly good. Like, unbelievably so. Maybe it's just the way the RNG went, butLucinashe's only a level 2 Great Lord and well over thirty points in total stats ahead of Chrom right now (for reference, he's a level 8 Great Lord). All I need to do is class her into Dark Rider and get her Galeforce and she'll be unstoppable.
Level is not a good measure of strength in this game. But yeah, she's one of the three "Best" characters. Everyone should be using her, Chrom, and the avatar.