Aren't the Xenos a small ragtag group of people who try and prevent foreign trade with liberty?
If Liberty cannot stand against Gallia now you expect us to believe the Xenos can? Heck, the Gaians even turned tail and ran when Gallia broke through Lewis! But now the Xenos are like what, Liberty's savior or something?
I hear what you are saying Zelot. They are more than likely going to disrupt and attack Gallic shipping and just be a nuisance, however, they are not going to be able to make any dent into the Gallic forces. Two houses (Bretonia/Kusari) get their you know what handed to them, but the Xenos can stand against them?
It would have been more believable to send Liberty fleets to Bretonia to head off or slow down the Gallic onslaught than sending in the Xeno calvary!