[QUOTE=Swapping from a two-handed to a one-handed setup would require completely redoing the animations for every ability in the Lancer's arsenal. That is pretty unlikely, especially when there's no reason to add blocking specifically to the class.[/QUOTE]
If they are adding in a new job, that alone is a pretty big deal, new animations would come along with it, and the reason to add in blocking, would be that it is a new job, just like for gladiator, they could add in a dps job that uses gun shields, that would be new animations, but new job, so there is the reason.