First of all, Terrran is still a suckage fleet for defence for the fact that their dmg sucks.. And ehmm Clipper and Tarant shoot same time so..
One more thing that Arrowheads are acutally supposed to kill cutters before they shoot, otherwise Xan FI fleet is garbage.. Maybe the Harpy is too strong, 60 arm/cost and 40 dmg/cost, nice
Suggestions to tweak Xans are:
Decrease Ghost intiative to 6, strengthen PK, Ghost and Vsh 'more' .. (For the fact that Ghost is only anti-CR, PK only anti-BS and Vsh only anti-FR for Xans, while they have 2 anti-FI, 2 anti-CO and 2 anti-DE and honestly I can't see why .. Maybe for the fact that the Xan FI/CO fleet is all needed for attack .. As They have a lot variety in the classes defending them .. FI, FR, DE, BS, CO.. YOu see my point ?)