Blizzard wrapped up the Diablo 4 Season 4 PTR (Public Test Realm) earlier this week after about a week of testing. Not only was this the first time Diablo 4 players were able to test out content well ahead of its launch, it was also necessary considering the magnitude of what was being proposed.
The Diablo 4 PTR was chiefly created to allow players to offer feedback on several fundamental changes that affect loot quality/frequency, itemisation principles, some gameplay mechanics and much more. The changes are set to arrive in the game with Season 4 on May 14, which is far enough away to allow Blizzard to digest and utilise that feedback.