Gallic Junkers seem like very interesting and diverse species. And Dab's post in that ID thread just reiterated their position in Gallic society - namely the lack of trust in them by every other Gallic faction. At the same time, they seem to run errands for all of them (bar the Maquis), so I think you'd lose something by allying too closely to one or another.
They seem like the 'tragic' actors of Gallic society for similar reasons as well. They have some tricks up their sleeve and they have to be sneaky by nature, but... They're nowhere near any kind of a position of power, currently less than ever, since the Royal Navy doesn't seem to necessarily need them any more. And the Corse and Brigands seem prone to killing them for sport/massacring their entire stations and trading with them when it suits them. Many would probably feel the urge to powerplay through those kind of situations, here's hoping you'll choose not to.
Oh, and You should probably move the Maquis to the 'at war' list as well. They hate anything that might be connected to the Crown with a passion.