(Image credit: Grinding Gear Games) Path of Exile 2 has one of the best action RPG campaigns out there, and it's not even finished yet. It wastes no time pushing you through each act as you gear up and watch the world of Wraeclast unravel. But when it's over, you're handed a gigantic world map filled with dozens of locations and no advice on where to start your endgame grind. That wasn't good enough for developer Grinding Gear Games, which is why it spent the last several months tearing everything out and rebuilding it so that PoE 2's endgame won't be as obtuse. All of it will be reworked in its "biggest expansion ever", Return of the Ancients, on May 29. (Image credit: Grinding Gear Games) On top of the new quests, each league mechanic has been polished up to be more intuitive and more powerful as you invest time into it. For example: The Genesis Tree from PoE 1 has taken root in PoE 2, offering new ways to craft (or more accurately, birth) jewelry items you can't get anywhere else.…