Darkrai EX was already a great card, and it paired exceptionally well with Yveltal EX, which resisted the Fighting type attackers that gave Darkrai trouble
Perhaps the current RDW is a bit slower out the gates so it has more time to stabilize
With Cyllene [Astral Radiance], Team Yells Cheer [Brilliant Stars], and Pal Pad [Scarlet and Violet] we can effectively loop any card over and over, so we can technically use infinite Crushing Hammer to destroy opposing Energy
Transmute Artifact is great but on the Reserve List
The unbanning of Bonders Ornament is intended to give a little momentum back to slower control decks, which have retreated from the metagame since the time when it was originally banned
This is going to be a theme of some of the worse heroic abilities, but Id rather just tap the creature with something else than rely on triggering this ability