I think it's more that alliances are lower on the priority list, if we're approaching this from the development point of:
1. Secure/prepare the fleet for use, get it functional and moving
2. Gather as many supplies as possible to survive a nomadic lifestyle for a while
3. Establish new leadership for the Chiss people, allocate Ruling Families and allocate economic/political/military responsibilities
3. Begin locating and collecting refugees, offering them a chance to return to their people
4. Avoid outright discovery by the Maw and other threats, and maintain the secrecy of the flotilla location
5. And then maybe look to see what groups or factions are in positions to be considered allies or friendly
6. Begin exploration missions, testing enemy positions, scout and update information for survival and/or retaliatory actions
That's a rough plot progression in my head, which doesn't include other member's ideas or plots they want to play out (throughout those points). Alliances are possible, yes, but I think the Chiss need to solidify the
Chiss first... and then look outward. Or maybe I could be wrong, I dunno.
That said, if the Ascendancy thing happens, members can pipe in with thoughts, and we'll see where it leads!