I mean the skill effects especially. Or maybe even the choice of skills. If you use Lightning Strike with many projectiles (which also return) and some fancy MTX: self-inflicted clutter. I played a Bleedplosion Gladiator and a Viper Strike of the Mamba Trickster this season, both were fine clutter-wise.

Visual clutter is your own responsibility in PoE, just saying :)
But I get where you come from.

<just some UI feedback from gleaning the screen shot>

• looks clean enough
• apparently contextual help, I like those
• tables love to be sortable (maybe the table is already sortable, please indicate (🔺🔻))
• the location of the ‘download’ button is somewhat random and it doesn’t need an extra border, the color is more than enough for it to stand out
• this also affects the order of screen reading/information intake