I like the idea of Kylo speaking to child Anakin.
It’s not so much Kylo speaking to child Anakin as much as it is Kylo trying to find anything to justify his view of Darth Vader, only to get every evidence of the contrary, signified by child Anakin shooting a scowl at him.
That being said, I also like the idea of keeping bits of the theatrical vision has when Kylo touches Vader’s mask, but overlaid with Anakin lines. For example, turn Anakin’s line from RotS “You turned her against me” into “[You] turned her against you” & overlay it with Rey shutting the door on Kylo from TLJ.