If you want to talk about suspicions, let's say that Exodus is pretty much just an excuse to artificially prolong the lifespan of Gallic Royalist factions by settling them on Gaia when they should have died in the wake of Pyres of Remembrance.
Bretonia's situation isn't improved by shipping a couple millions of refugees out of Leeds, nothing functionally changes for it, but that millions of Gallic soldiers and Bretonian slaves are evacuated out of Leeds to a fortress Edinburgh while NOBODY does anything about the Triumphs at all is just a favor to keep the GRN and affiliated factions viably playable. You're getting the bigger amount of plot armor so please shut up and let this thing end.