I think they trusted blizzard to not mess up the game, and they did of course.
Patch Notes 1.10a
Fixed multiple issues where players have fun
Fixed multiple issues where players weren't weak enough
| Developers Note: Since resistances are broke and we aren't fixing them until season 2 (next
| season), we figured we'd reduce armor to the point it barely works as well.
Fixed multiple issues where EXP gain seemed reasonable
Fixed multiple issues where players were able to get helltide rewards in a reasonable time
It's actually a really good game. I've yet to talk to a person in real life who's tried it and hasn't liked it. Lots of people online like to say it's a failure because of greedy Activision/Blizzard, so I'd take most things you read with a grain of salt.
Like all Diablo games, the end game content gets a bit repetitive. I personally enjoy the grind, but it's not for everyone. The main story is phenomenal too.