This is why I wanted PoE2 campaign to actually be hard and force you to take it seriously.
That's just a pipedream. These games are based on repetition and grind, and realistically, you won't even be able to max out your character during a normal playthrough.
In PoE2 you will get to level 45 at the end of Act 3, then move to NG+ (Cruel level difficulty) to get to level 65, and then move to the endgame to get to 100.
NG+ will be replaced by acts 4, 5 and 6 on full release. They removed them on EA release to get more content for Endgame.
The only thing that could change are the bosses, since now you have WASD controls and dodge and some things could be based on your actual skill.