I believe that you need at least 200hours or more of play time to determine whether the midrange hump is part of the driver's idiocyncracy or something else. If it is the earlier, perhaps some driver basket damping or other modding might be on call to reduce that characteristic. In regards to the soft bass, you might need to get a step baffle compensation unit to add the bass that is missing, of course at expense of efficiency OR get a Behringer unit that will do the sound tailoring for you($200 or less?.) An intriguing execution of a system. For what I see, very difficult to improve it without either detracting from its merits or adding further deficiencies. Nice and affordable.
Paul K