Currently Rey has several 60 banner counters due to her defensive kit. She wastes her initial turns with a buff that is easily countered and worked around, while Kylo first turn is always a 2 turn locked stun creating a 5v4 situation out the gate. Kylo has nothing approaching a 60 banner counter, plus hes a monster in the highest gear reward activity in the game (HSTR).
So how would YOU fix this imbalance?
My suggestion is 2 small kit changes to rey.
1: Add to leadership "Light side allies are immune to fear and damage over time effects".
Kylo is immune to taunt effects to make him hard to counter. This would give Rey parity in PvP and fit her defensive build.
2: Add to her ultimate, "When in ultimate stance, light side allies are immune to critical hits"
Again this fits her defensive build and makes her ultimate meaningful.