User blog comment:DiegoAnime3000/A lot headcanons were confirmed today/@comment-11188061-20140829010046

I don't know how that's called a dark side. She good enough to keep her use of Semblance nearly invisible, and yet isn't prideful enough not to use her Semblance at all in a fight, because it's plain bad practice and you never know what will happen in a fight. You've got to have a certain amount of cunningness to be champions four years in a row.

On the other hand, we don't know if those fights have a No-Semblance rule. If that is true then yes, Pyrrha basically cheated even though she obviously kept the use to a minimum. If it's not, then she's actually honorable for fighting it out, and not using her Semblance and take down her enemies in a single blow.