They're not legally imperial citizens, they were granted independence by the rightfully elected Emperor. And they don't want to be imperial citizens either.
They tried to stop the WP?
If I remember correctly, Gotrek and Felix had a running joke about them being big heroes and absolute nobodies at the same time or something. They would get roped up in some big adventure, clear up the issue and save the day, they wouldn't be recognised by the public for their deeds (even if Felix actively publishes them, the running joke is that no one believes his stories. He's seen as some random nobody poet from Reikland), and to add salt to the wound, they would end up destroying whatever tavern they end up in, either running away or paying for damages, and what remaining money they have is spent on alcohol for Gotrek. So the net result is that despite everything they get no money, but they have just enough to live on it and Felix has enough to maintain his writing supplies.
They tried to stop the Canal. Possibly up to attempting direct sabotage, but that's just theory at the moment.
I'm pretty sure he got that sword from his adventure with Gotrek in K8P and he was allowed to take it as a gift from Belegar, so I can understand not wanting to give it up. It did something like give him an innate knowledge of how to fight? Or he took fencing lessons, I can't remember which. It definitely had Dragonslaying abilities and I remember something about it changing and transforming his physiology. Likely because the author wanted him to keep up with Gotrek and the running gag of him being so much weaker was limiting narrative options and stretching SoD on how he would survive without some supernatural protection.
One thing that we can be absolutely certain on is that they threatened to block the Empire from outside trade if they didn't get the Dwarfs to stop construction. That's still trying to stop it.
Yeah I just checked and his backstory involves him accidentally killing someone in a duel over a protest or something like that. Then something something almost gets trampled to death by Reiksguard something something drunk Gotrek saves him, kills a bunch of guys, then makes an oath to Felix that when he wakes up he remembers so the two become joined at the hip for like two decades.
They aren't Imperial citizens any more than the denizens of the Border Princes are.
Rather a large number of the denizens of the Border Princes are Imperial citizens, just due to geographical realities of what place is nearest to the Border Princes (Tilea is both smaller and has lot more land that isn't covered by Beastman-infested forests, so a relative minority would have the motivation for leaving for elsewhere). It is an ancient and venerable family line in the Border Princes that manages to hold onto any lands or titles for even three generations of succession, and most of the population isn't born there.
He gets the blade in K8P after his original sword got broken in a fight with a mutated troll. Sword was originaly usex by a templar knight, who died in K8P after joining Belegar. In one of the later books large part of the plot is that Felix is confronted by a guy from the same knightly order, who demands the blade back.
Pretty sure much later on in the series they use the sword to justify why Felix physically is the same age even though he's now been adventuring with Gotrek for something like 30 years.
Point of order, momentum does carry over between teleports.I have no idea what we'll do with Eike, but I assume Boney will come up with something. I recommend it be hosted in K8P and include some crazy antics. Like jumping off Mathilde's Gyrocarriage with Eike in tow and teleporting before hitting the ground for the skydiving experience. I don't think momentum carries over with teleports. Clearly nothing will go wrong. Regimand does it after all
