I love path of exile and atm, I favor it more than D3 but this statement is plain wrong.
Every season is a plain buggy ol mess, with dumb oneshotty mechanics.
Even now, in heist league, there was a huge problem where you die as soon as a door opens because of mobs stacking behind doors, most of their forums are complaints about there being no QA or testing at all.
Now, like I said I love the game, it’s a nice " spiritual " successor to diablo 2, but it has got nothing on Diablo 2 or Diablo 3 in terms of being solid, consistent and polished.