My personal opinion is that there should be a XIV variant frigate and the Centurion is perfect for this because in it's description the ship was used in the "Domain-era doctrine practiced by the successor state of the XIV Battlegroup:".
I think its strange that the ship which literally states it was frequently used by the XIV does not have an XIV paintjob. Also, adding in an XIV variant will give us access to a complete fleet of XIV, at the moment only the frigate class is missing out. There's the enforcer, dominator, eagle, falcon, legion and onslaught, but no frigate.