Honestly the whole direction of Widargelt from the end of ARR has been away from simply Liberating Ala Mhigo. That is discussed in the very first SB MNK quest were he references his lessons learned at the end of ARR and HW. That isn't how he wants to serve Ala Mhigo. More to the point, he has literally no interest in his birthright and is instead rather horrified by it. I suspect likewise he will seek to keep the Fist of Rhalgr out of politics. The new Fist is about helping the Ala Mhigans once more return to their religious traditions and empowering the people of Ala Mhigo with the strength to protect their own.