err....Xan's CR/BS are defnitely not their better ships
I can see attacks veering away from roids, and going towards targettting structures and ships, and xan's FR are far superior at doing that. Building FI, rather than CR+BS means 1 less ship-class, which leaves the option of a second attack fleet a realistic possibility, rather than having small numbers of 2 classes.
The adv/disadv of xan are the same as in previous round though. While you see very few attackers landing on defence this round, Xan are perhaps even more reluctant to do so (rightly so imo!) than other races, as they stand to lose more (sure, they'll kill more too, but thats not really something you think about when half your ships are dead
)
I think Xan is easier to do well with than other races, but to do very well (i.e. top-30) its not the ideal race, as it's "all or nothing" mentality isn't productive enough for success.