I do think Keiji can speak a little faster. I think it might be the same deal as what I said on your last audition, that maybe you're thinking too much about your speech patterns instead of what you're saying and it's adding tension. Its more important to me to hear you play and act than to get perfect diction and an American accent every time. Id rather fine tune than stifle you.
That aside, you sound great! You're a solid contender for Keiji. You manage to get his laid-back feel without losing energy and that's a difficult mix to achieve. You can absolutely play around more with some of the inflection and approaches.