Okay, it's 2022 and the mobile sequel (Diablo Immortal) and it's second part (Diablo 4) is just on the horizon, preparing to release for consoles. Unlike the many copy and pasted reviews here from trolls, I actually own the game and when it doesn't have as much content as WoW. And nobody has ever claimed that. So not sure where the review bombers get that from.
What we do know is that the Diablo series actually has some substance to it, substance as in lore and world building has WAY more depth than World Of Warcraft or any Warcraft game. Same can be said with Overwatch. Maybe a child would disagree. Diablo draws a lot of inspirations and lore from Biblical principals as well as other religions so, it's not set to just one religion.
The amount of replayability is the same as World Of Warcraft, like World Of Warcraft, there are many routes you can take, many ways to finish the game. Nearly infinite playthroughs thanks to different styles and weapons. Story, voice actions and writing are far better than WoW's. So there's that as well. So it's funny to see a lot of these copy and paste reviews from people who've never played the game but only to troll the game because Blizzard has made yet another masterpiece and one that's better than WOW.