For those who’ve read Thrawn: Treason

I just finished reading Thrawn: Treason and for those who've read it you'd know that thrawn commits treason in the book (who could've guessed). I really love how the final chapter and epilogue lead directly into the final episodes of Rebels with the battle of Lothal. But in the epilogue Palpatine questions Thrawn's loyalty, and says that after Lothal then he's go "talk" with Thrawn. So like, if the purrgils didn't exile the Chimaera then palptine would've killed Thrawn, right? Like as much as I love Thrawn, he was sort of a liability to the Empire despite his tactical genius. He was definitely more loyal to the chiss than the Empire.