That "Pass" skill

Not yet.

But since obstruct happened to be useful for one of the GHB (the Alm + Celica one), maybe someday pass will have its own utility for one of those battles ?

I've thought about slapping it on a melee cavalry unit but dragback is just so much more useful. In general, mobility is so limited in this game that I can't see it being used outside of a nasty surprise to ruin someone's arena run or a tool to solve a specific problem (i.e. taking out a critical enemy in a GHB).

I wish they made a skill called Acrobat (from awakening), allowing units to traverse all spaces with one movement (like how flying units move), and probably cross mountains too...