So Rey currently claims with Finn that she saw both Kylo and herself on the Sith throne in her vision. This is wrong. Only Rey is seen on the throne in both the theatrical release and Ascendant. And the vision in Ascendant, in my interpretation, represents the two dark paths she could end up on (either with Kylo or the Sith).

Luckily this can be corrected by simply removing Finn’s line: “Ren?”

The only other thing that would need to be done to undo Kylo’s character regression would be to replace his line “We’ll kill him, and take the throne.” I’m still having trouble finding a suitable replacement for that.