tweeter control L pad

Is no secret , that old time loudspeakers supply with L pads , as all amplifiers supply with treble and bass control. It was era Hi Fi sound. Now is High End time. Most of the amplifiers ( some exception)  no   tone control. Majority loudspeakers also , exceptions   high cost  loudspeakers got jumpers to get 1,2 or 3 db controls.    Another hand, when folk listen   some famous brands still complain -sound is too sharp or too dull, no transparent .  I decide to install in all speakers L pads,   What do you think?