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.
Well, that’s… the whole point of the sequel trilogy though, isn’t it? All three legacy characters (Luke, Han, Leia) failed miserably after RotJ. I don’t think anyone likes the direction they took with the story, but unless we rewrite and reshoot the entire three films, what can we do…