One possible solution to the problem is time expansion in the bubble: taking a 200ly trip would age the universe by 200 years outside the bubble (from the frame of reference of those inside).
There are galaxies moving faster than c away from us right now.
In my mind the "cascade of simplicity" occurred when I subconsciously realized that bullet-time mechanics could really occur is a multiplayer game. The player in bullet-time would experience higher tickrate that anyone else, meaning that anyone else would see them speeding away. There's more to make it possible in a simulation, but that's unimportant: you can reason about these scenarios. My reasoning maybe incorrect, but it does afford me the ability to approach these mind-blowing subjects.
Either way, it may be impossible for a subluminal observer to identify a superluminal apart from a warp traveller (aside from the former being outright impossible). The observation is identical, the cause is completely different.