ftfy. I'm still left dumbstruck when I see a brown guy on screen in a role that isn't a fucking terrorist, cab driver, or convenience store employee. Let alone be written to at all empathize with as opposed to being a passing joke.
I'm not at all denying the importance of seeing a female lead in a Star Wars movie (not to mention Rogue One next year), but I also don't see why they'd introduce the element of her potential to tap into the darkside so early if they didn't intend on flirting with that idea moreso later on. As it stands, her flirtation with the darkside in this movie is no different than what Luke had to face at the end of his journey in ROTJ.
Say the next movie has her now knowing about what the Light/Dark dynamic. It'd be real unfitting then to not approach her with that choice again and have her either push against that temptation or to fall to it. If she resists, it'd be redundant to do it a third time. If she falls, even briefly, or chooses to run etc, atleast narratively she then has somewhere to go afterwards. Whether it be redemption, or to have her need to re-embrace the Force or something.