His arc was that he started off as a cocky guy who was very formal. Each time he got more and more aggravated, and in a figurative and literal way "shed his skin" to unleash the true monster of a character, with no more formalities.
His loss of control was his arc, and I very much liked it...
I happen to be on the side of Skyward Sword lovers.
Characters: Ghirahim is really cool, Groose is amazing, Zelda's alright
Grapics: I didn't mind them. They remind me a lot of the BoTW graphics
Story: I liked the story a lot.
Dungeons: Great dungeons. I loved them
Music: The music was...