You really need to work on that huge null between 60Hz and 80Hz (and above really). Have you tried using REW find the best placement for your sub?
I think you are over-dramatising the problem. Modesty prevents me from exposing my own crossover trough to public ridicule despite hours of REW and BFD adjustment. It is probably a result of an off-centre subwoofer relative to the mains. Only one speaker is responsible for my own trough.
Lampshader would have noticed a tightening of the bass simply as result of reducing the subwoofer output level. Though the higher frequencies look much improved as well. It should sound cleaner and faster as a result.
I am still not convinced that these EQ'd graphs are artificial constructs. I believe it is simply the result of applied smoothing after equalisation. It looks like whole octave smoothing to me. I have tried this on REW and achieved very similar results. (On the REW graphs) This can be very useful to adjust overall trends in response where detail really doesn't matter.