Luke's learned to pick his battles a lot more wisely. Diving headfirst into active and overt rebellion is a really good way of getting killed, betrayed and strung up as an example.

"I'm glad. I think those of us who have the privilege and power owe it to others to help them. Protect them when they need it, provide when they're denied the chance to provide for themselves." He helps to usher her off the train, finding himself making the comparison with Leia and concluding. "You're taller than Leia."