As someone who defends TRoS, Kylo rebuilding his mask, and his relationship with Palpatine, and understands the story reasons and necessities behind them, I do agree that he didn’t feel exactly like Kylo Ren from TLJ specifically. I propose a new line after his proposal to Rey for them to kill Palps and take the throne.
KYLO REN: We’ll kill him together, and take the throne. Reform his Order into our own, berid of the things of old.