The reviews I’ve read of your speakers do not indicate an inherent brightness at all, and your associated equipment also should be fine so I’m thinking additional break in should yield significant improvements. What interconnects are you using? BTW, if you’d like to significantly upgrade your speaker cables here’s a pair of Acoustic Zen shotgun bi-wire cables (I’ve used these for many years) for only $350, which is a ridiculous price for these cables. You should jump on them, and if you don’t like them for some reason you can probably sell them for a profit.
https://www.usaudiomart.com/details/650194860-acoustic-zen-satori-shotgun-biwired-speaker-cables/