reimplementing the entire game in a new engine is economically unfeasible
This is equivalent to literally making the game from scratch and changing some art assets is no where near as complex and time-consuming as that would be.
The upcoming season is adding a new “gem” type very similar to Diablo 3 legendary gems that will (presumably) result in more robust endgame builds. They also mentioned a new boss being added, though I’m not sure what level/World Tier it will be at.
No, that’s not how it works at all. All of your public posts are already public anyway, Threads doesn’t need to be involved for literally anyone to go through all of your posts right now.
Slightly longer answer is: “all of your public posts on Lemmy or Mastodon or any other federated platform are the Public web. So no, it’s not different.”