If Kenpachi could control his power then I would give it to him. He just slash and gash. But I dont really beleive all the Akuma hype. I know he is very strong. But thing is. People are spamming the sinking island technique like he constantly could do it. I could have sworn it took all of his energy to do so.
Akuma would most likely get tooled by the other Captains Level. Like Byakuka, Aizen, Tousen, Ichigo, Shunsui and Ukitake,
Dodging Bullets doesnt equal being faster than a bullet. People have very well calculated where the bullet is going to go and moves faster than the person can pull the trigger. That is basically in theory how the art of dodging a bullet is done.