I think the big issue with Leia choosing politics over being a Jedi is that it comes off as a terribly foolish decision. In the end, diplomacy failed; by the time we meet her in TFA she’s leading an underground militia, and her sole hope lies on Luke’s return to help in the fight. You’d think she would be beating herself up for quitting her training all those years ago, mastery over the Force would’ve been a lot more helpful against the First Order than her diplomatic skills. Moreover, if she had completed her training, she could’ve taught her son herself instead of sending him away, thus preventing the fall of Luke’s temple and even the fall of Ben Solo.

The only reasonable way Leia can be justified in not becoming a Jedi is if she had to, not just because she felt like it. This is what the original does, but in a really dumb way, that’s why we landed on simply having her sense that she was not meant to go down that path. Maybe with this new A.I. we can generate a line that helps this come across better, but I still think this is the idea we need to lean on.