What we need in the market is a team of bespoke speaker tuners that go around tuning the speakers of serious audiophiles. The speaker tuner would take into account your preference and listening environment before redesigning the crossover from scratch. If you needed 1db boost at 10khz to compensate for hearing loss due to old age, then so be it. The resultant frequency response would NOT be a generic ruler flat response, it would be unique to you.
Many speakers in the marketplace receive strong criticsm for all the wrong reasons. Most speakers are often perfectly acceptable if only their crossovers were custom tuned to the customer.
Since a speaker tuning service is not currently a mainstream service, audiophiles end up on the speaker merry go round, buying and selling speakers endlessly on the pretext of an 'upgrade.' Whereas all they really need is their speakers retuned.
Of course, a significant minority of the audiophile community do not require custom tuning since their hearing is so poor that a generic off the shelf speaker would do the trick.
Moreover, a speaker retuning service would negate much of the differences between any two given speakers, and would negate the need for more speakers to be produced and would damage the speaker industry. Consequently, its not surprising we do not see the wider availability of speaker tuning services