Those graphs are as useful as a world map drawn by a 5 y.o.
Too simplified. Too much smoothing.
And regarding the "fixed" issue. Just buy some felt tape and do a correct fix.
Resonances in a chamber will still be resonances in a chamber unless they're dampened away. Either by (1) modifying the driver or (2) dampening the chamber. The first is highly unlikely considering the costs linked to changing the driver. The latter, just remove the dust cover, therefore, nope, not that either.
If you have to tape in a 1500 dollar headphone to make it sound right, then clearly the manufacturer made a mistake..