What do you think Lyoto Machida needs to remain champion?

I believe what Lyoto Machida needs most to remain champion for a long long time is knock out power. Like Chuck Liddel or Rampage. Machida's takedowns, speed, judgement, technique, takedown defence, BJJ-considering he's a black belt are very good and well developed. However, were he lacks is his knock down power, to knock out Rashad he used a huge flurry of punches. If you've watched his brother Chinzo Machida, he knocked down his opponent 2 or 3 times during the fight with one punch. Machida needs some more striking power to damage his opponents. I doubt it's related to style, as GSP, Chuck Liddel and Chinzo Machida are all karate users with great striking power. Machida should move an hour from his elusiveness training to his striking training. A Machida with knock out power could bring him to the GSP/Silva/BJ Penn dominance level.