Board Thread:The Official Announcement Board/@comment-1875854-20160624151406/@comment-4869113-20160624181424

The problem with Golden Darkness, in my opinion, is that the enemy forces, being the Zetsu, are vastly overpowered with no real explanation to how they came upon, especially when you have Sasuke exploring the world constantly and looking for remnants of Kaguya threats.

2) Second, you can't forget about the shinobi union. The ninja of the allied forces killed half of the Zetsu, while most of them probably fell more or less to the edo Tensei summonings, so for people to think that the Zetsu are THAT powerful is difficult.

So, initially, in short, I think the issue with Golden Darkness is a lack of plausibility.