Well, there's 2 potential new races.
But the refugees had me curious when someone mentionned them using a ram scoop apparently which might be an outdated technology in the FTL age.... for pretty much anybody else but the Hivers.
So as though the refugees were considered as advanced* than the other races, my question had been what kind of FTL drive they packed.... if it'd be something similar to something else we already knew of. Then when someone mentionned one of their ship having something similar to ram scoop, my question suddenly was "... do they even -have- an FTL drive?". Even if unlikely again, the thought of a sort of generation spanning migrant fleet(s) has a certain charm I feel not really seen anywhere, especially if we are talking of a race that truly did adapt to fully live in space(if it was hinted it might be possible to create a naturally vaccuum-proof hiver for example... and take a race-full equivalent of such a race who due to the botched colonization attempt has taken to space to the point of talking about generations born and dying in space, I do believe that might be a "significant" change from what we are used to from the likes of Hivers.
Similarly, it would give a whole other meaning to their "mothership".
Possibly not just the "mother" ship of their fleet, but actually the ship meant to house their actual mother. Maybe it's the ship housing their actual Queen.
Or, if they are actually fleeing their own race or something similar, maybe it is that it is not their Queen in that ship, but only a rogue or exiled Princess fleeing the wrath of the rest of her mother or rival princesses(or whatever might be the term within their society), and thus there might not be a single mothership, but actually multiples ones roving around space each housing a separate princess and Clan.
Thus this might make the refugees arrival simply a "gentler" version of a similar event amongst the actual Hivers, when rogue Obsidian princess's fleet arrived on Earth. The Refugees merely asked for help rather than shooting first.
Still, I just feel the idea shouldn't neccessarily be handwaved as potentially be "not being different enough" as we don't know what their civilization actually is like.
If we're talking about one that adapted to live fully in space, not just in the manner of the morrigis but to truly -thrive- in a fully spaceborn life of roving migrant fleets or a variant of such a gameplay somehow... I do believe we might be able to look at a race with the possibility of not only different tech but wildly different gameplay altogether.
Then again, I wouldn't be too surprised if such a wall of text speculation ended up completely wrong but heh. One can sometimes wonder I guess.
Also, regarding earlier speculation on other subjects, the thing is we need to recall the plan is for two different playable races eventually.
Though the "Ghost ship mystery" is still something that has me curious and still thinking. And proteans might have potential if as people speculated some Elder Races were still around but as speculated just not anymore even close to the level of knowledge/might that they once packed, like a more extreme example of the Morrigis' empire's own slow collapse.
In fact, with the timespan involved, one might wonder if such a race even recall anything of it's far-off past.... or even look the same than they used you considering we're talking timespan higher than the likes of which it took for humanity to evolves from ape-like primates to their present form(or, potentially, for an advanced race to "devolve" to a less advanced level, a shadow of their former mighty self.... which actually might fit with a shout-out to the Elder Things from Poe's work that was once made in one of the Proteans speculation. A highy advanced race of frighteningly advanced technology... now almost nothing more than the savage remnant of a shadow of their former selves probably not even recalling their past).