I like this. I was wondering why this Trixie seemed to still have a problem with Twilight. And this makes it easier to understand, she's still jealous not of Twilight's skill/tutelage but the connections she's made with from it. That for all of her,Trixie's, talents she is currently alone. But from the title I can see that helping her recover, not just in her standings as a performer but as a person. I may be wrong, but it'll be fun to watch the journey to that answer.
Trixie should come back in another episode and duel Twilight again (on friendlier terms of course) if training to be stronger is what she's been doing off-screen. Even though she's more or less friends with her, I imagine the rivalry is still there. Just think of how she'd react to hearing Twilight as a princess and an alicorn. Her pride may end up forcing her to do some special training (or do something stupid. It depends on what the writers do). Could lead to some much needed epic fights for FIM. I really hope the writers take a different direction and make stuff like this happen!