Hal 9000 said:
For the Leia training flashback, Leia’s face displays some emotion so I don’t think it would fit to just say she decided to go with her political career; there should be something there but I’m not sure what. >

I honestly don’t see any problems. She knows being a jedi means a great deal to Luke, to her father’s legacy and to the galaxy overall, so it would be very natural and expected that she’d had some massive inner conflict about “abandoning” the jedi path to follow a political career.