I think the lore will be mostly unchanged in regards to the Almayers deployment.
They are the closest Marine ship to the area sending the distress call, so they get to respond despite how they are underprepared (lack of veteran manpower, low ammo (using shitty non-AP/Explosive ammo), and other issues).
The only questionable decision is to send Marines to clear a Space Station of xenos. In universe, every, single, attempt to clear a space ship or station has resulted in abject failure, and its usually SOP to just blow up the station rather than waste lives. I think only on ONE occasion a ship was cleared of xenos, but that came with massive casualties to the Marine forces.
So, my best bet could be that the brass are hoping the Almayer can get to the Prison Station before the Xeno hive fortifies.