I don't really mind if she is a clone or semi-clone. I am much more bothered by the fact that her idle animations are exactly the same as Marth's. Like, her fighting pose in Awakening was pretty unique to her and was kinda iconic. They really took the time to flesh out Robin so much to include a vast variety of tomes in Awakening, like Thoron, Nosferatu, Elwind, Arcfire, and the Bronze Sword and Levin Sword, but they really couldn't give Lucina the fighting pose she actually uses that makes her unique? Did they really have to copy Marth THAT much as to even give the the putting her hand on her chest thing? I love Lucina and she was one of my most wanted newcomers, but just that little thing bothers me so much for some reason. I mean, I figure Lucina was requested, especially in Japan since I think she is more popular there, and Fire Emblem in general I believe is more popular in the East, but they just didnt really seem to do her justice compared to the other newcomers.
I mean, even the hackers that made this mod or whatever gave Lucina the pose and did it pretty well actually. I would think Sakurai would do the same since Awakening seems to be getting a good amount of attention.
TL;DR: Lucina's idle animations bother me quite a bit.