Removing every Kryptonian Post-Crisis. I can kinda get streamlining a few cases, but some just seemed to be struggles for the writers themselves. From Atlantean Power Girl, Matrix Supergirl, and a human Zod.

The creeper being possessed by an oni

Hale being possessed by a entity

Martin Stein and Max Lord having been evil all along.

Making Mr. Freeze a creepy stalker rather than Nora Fries’s husband. It just reeks of everything that made the New 52 suck so bad.