Yep, Pate is way surprised even fearful, whereas Alice and Sedna seem more amazed teleportation happened. Either them thinking it impossible physics-wise, or a long-gone tech... or it's just been so long they've fully forgotten what it's like out here. After all Sedna does talk about the navigation issues.
One might wonder if they're actually in near-Earth orbit of some sort (or the ship has some sort of anti-gravity impulse drive "hovering" capacity etc). Difficult to tell when the tech can pretty much be doing anything that could be imagined or even things that can't. There's either some way they're attached or a local gravity of sorts, but seemingly nothing to breathe or maybe even no temperature control (unless they're wearing the suits just in case and don't really need them just yet). We just don't know what atmosphere if any is in the ship right now, or if the tech is high enough to not make any of the otherwise practical things have any bearing on this situation. As far as removing Church... If somehow he could be ejected what then to him. (And for Gavia, Ardent and Pate, exactly how strong and clingy and force and gravity and temperature controlled are those spacesuits, anyway. Do they supply air or not. ) What happens to get Church out, how, and so far Ardent hasn't seemed the type to just suddenly space anyone, even if he could. But if so, is it just Church that goes? Does he do his magic trick thing and get back inside? Either way, if they're near the planet's gravitational pull, one imagines not orbit but re-entry. Reminds me of John getting back planetside at the start of Halo 3. Not that Church has MJOLNIR armor to cushion or lock up, but still. Although for Sedna at least, they can be damaged. So really, what does a high-speed fall of some 100 miles or more do to even the heartiest of non-sleeping whatever they are?
It wouldn't seem so far story-wise (barring a twist or surprise or the reveal of plans we don't know of) that the time or situation is correct to try and attack or remove or neutralize either Church or Pate. Aside from the safety of Ardent and Gavia (their own concern or that of Sedna or Alice) this might not be the best time wisdom-wise to start in-fighting (they are more of a group banded together at this point than combatants). Either way, both Sedna and Alice seem to think they can't outclass Church in the physical department. It's not clear either Ardent or Gavia would have even an idea of where to begin, that they'd be fearful of an immediate case of being beaten to a pulp disease.
It seems likely at this point the habitats are perhaps the rulers and the denizens live on the things that run the whatever is out here.