Or maybe I think this is quite unclear, especially in some situations like "not sure what was wrong but something was".
Something is not right then, either measurements or the whole idea of "only FR matters" science.
There were enough speakers what measured way worse (including directivity) while being called joyful/acceptable to listen.
Amir's experience will not necessarily translate to your or everybody else's experience, not only it is sighted but it is also influenced by Amir's room and personal biases.
you have to experiment and figure out what is your target curve, find out what sounds good to you instead of what sounds good to other people, it is very clear which part of the review is objective and which part is subjective.
but to be perfectly clear, the boost in bass will have similar effect to knocking down the mid-range resonances. so it's not unsubstantiated or strange in my opinion.