About the Xeno storyline and what their role is going to be. I do not think Xenos will be attacking the Gallic fleet. That would just be plain stupid. Xenos are alot of things but I bet they enjoy living. They're going to be attacking supply shipments. If that is not the intention the dev to had it should be.
You do not when a war just by beating the crap out of someone. Sometimes you have to involve other tactics. Those tactics include disrupting the supply lines of your enemy. By either destroying supply ships or taking the supplies for your own use.
It is a tactic called: WAR OF ATTRITION. You steal or destroy enough of your enemies supplies, well, they just do not have enough to outfit their war machine anymore do they?
I believe that is what Zelot is trying to convey. It is not that the Xenos will take on Gallic forces but hurt them so that it slows their advance enough and use their supplies to replenish the Bretonian/Liberty war efforts.
Can anyone see a new Xeno faction in Bretonia to do just that?