lol well mitsurugi is broken in fact but I didn't say anything against him, he is free to pick whoever he wants, nightmare, patroklos, mitsurugi, viola, hilde, whatever! he will find the way to become stronger, I just find mitsu boring to use, pyrrha is more like a combo character and she is more versatile (the regular one/she's easier and noob-friendly) so i told him what I would pick for my main character, maybe because i've always liked the sword & shield stuff, i don't really know
and no, i didn't say that using a difficult character will make you a better player, it MAY improve the way you see the mechanics of the game or at least it did that to me, I use alpha patroklos for example but I prefer to play with pyrrha omega because she has the style i've always loved, no matter if she is difficult or hard to master :)
and yea i always read complains about my pyrrha omega saying that she's cheap or that she is annoying, well let me tell you, I AM ANNOYING because the way I use her is good and if they find a good player annoying then yea, they're right ^_^