If PoE2 has a boss fight mechanic like the Searing Exarch's meatballs...

PoE2 is going to have MANY boss mechanics which are significantly harder versions of the Exarch bullet hell, because we have WASD movement and a dodge roll to facilitate far easier manual dodging.

Get good.

At least you can see the balls, and while toughing one definitely hurts, at least it isn't an automatic "fuck you, no life recovery for what might as well be forever". Compare that to the Maven fight, where it's just nonstop flashing and moving lights blinding you to anything and everything, while you have to maintain pixel perfect control over your character positioning throughout much of the fight, a fight which seems designed specifically to punish anyone playing a slower more defensively-focused build instead of a glass cannon. The so-called "memory game" (more like the "haha you can't see shit so just die" game) is the single worst boss mechanic ever devised, particularly given how it was implemented such that you can't actually see what it is you're supposed to memorize because of all the blinking flashing bullshit and total lack of color contrast.