I always wished they'd done more with Ninjas All Fours trait (remind me why that still exists, by the way). Actually I wish they gave every Job some unique gimmick like that, solely for the purpose of making dungeons slightly more interesting. Like say Ninja can survive a fall and open up a different path in the dungeon, while Samurai can run on water for a brief period and that leads to something that lets them open up a different path. That way you can have dungeons with branching paths, rather than the linear snore-fests we've been left with, and conveniently remove the whole "people will just take the fastest route" argument because the route would be based on party composition.