I would never describe Kym Jane as "lethargic" On the contrary, what characterises her performances, for me, is the sheer energy she puts into them. She always gives the impression of a girl fighting desperately hard, if not to win, then at least to stave off defeat for as long as she possibly can.
I'm sure Kym enjoys the feeling of being totally helpless in the hands of another woman, and her high energy style, fighting herself into complete exhaustion, is one way of achieving it. I can understand how this might not appeal to someone who needs to know that both combatants are actually trying to WIN in order to enjoy the outcome of a match, but Kym is no "jobber"
She has the most expressive face of any female fighter I've seen, and the visible signs of arousal she displays as the fight progresses - stiffly erect nipples and swollen vulva - testify to the fact that the emotions you see on her face are no act. Kym LIVES the role.
Bear in mind too, that she has four victories on her record to date, and on those occasions when Kyms mood and the right opponent coincide, she makes a great dominatrix, aggressive and ruthless as you like.