Achievements

Achievements would make POE2 so much better,
TBOI-like where every class and every end-game objective has similar milestones where reaching one unlocks some kind of cosmetics.

For example reaching lvl 100 with Witch grants you MTX
that allows you to fly instead of walk,
or killing Arbiter gives you special weapon cosmetic each for every class.
(perhaps killing Uber variant gives you upgraded variant of this weapon)
Or lets say you got lvl100 with every class and you get some giga flex item, ETC.

I was thinking about that for a while,
every league so far i find my self losing interest around lvl 92 or so,
after i buy decent gear and have all essentials for my build it feels like there is no reason to play further until new league comes so i can do the same with Druid or something.

So i believe giving players this "reason" to hit lvl100, or "reason" to actually go and kill Arbiter of Ash, especially Uber one would greatly improve the game as long as this system gets enough love, touching every class and all of the objectives that you normaly aim to reach and compleate.

We gonna play this game for 1000s of hours anyways, might as well add 1001% so we can have more fun.