The Empire is gone. Death Troopers may be the only surviving part of it, if they're not even just Guild members in the armor. The AT-ST in the trailers seems to have been stolen by pirates, so I assume our protagonists are hired with bringing it down. The girl is even a former Shocktrooper, which is a really neat backstory.
My point is that love is such a major part of people's lives, that highschool is basically planted in it, when teens' hormones are all over the place. I'm not saying adult life is like that, I'm just emphasizing its presence.
Your point is that it ruins the character, my point is that it makes them 3-dimensional. Boba Fett is a flirty guy, that gives him character, despite it being nothing more than that.
That's not true.
That comes from Machiavelli, who essentially fought for absolute monarchy. He basically wanted what society today would call a villain. If you have to kill half the universe for the other half to live, I'd argue that the end doesn't justify anything.
Which is probably what would happen, unless we get a Ventress scenario where the hire was all a truly villainous act that would do much more harm than betraying the hirer would do.