Gallia is too far removed and too isolationist for anyone outside of Sirius to really take notice of.
Essentially almost the entire server load of characters made before 4.85 won't have any interaction with Gallia.
Which effectively leads to it being a bit..dead.
The systems are effectively in their own bubble but we don't have enough players to sustain it properly 90% of the time. So you end up with empty systems and little interaction.
In terms of the Council getting in touch with forces in Sirius, no one has been allowed to play as the Official faction for the Council, so nothing like that can happen. Which also makes for the entire place seeming unfinished and the players unwelcome.