In my humble opinion, it is. I enjoyed Diablo III, but the rune system and the myriad degrees of difficulty just didn't appeal to me - and I've to confess that Diablo III's Act 2 is one of my favorites in the franchise. I genuinely believe Diablo IV has absorbed all the feedback from the previous games and refined the skill tree and combat system to a new zenith, making it a more enjoyable and worryingly addictive experience.