The spot I have the biggest disagreement on the Akula's original design is that photon battery rear section (again, why no rear ports?) so no disagreement there. About the only remark I have on your revision at the moment is considering making the lower pylon a little longer between the photon and warp pylon... perhaps continue the vector of the neck through the photon box and into the nacelle, instead of cutting it back. Maybe throw some neck details from the base of the Constitution there also.
That top pylon is marvelous though

I don't know why it's that way, it's not practical over a straight version of the Refit constitution's, but it's one of the things that's distinct about this class.