I'm holding out hope that ROG will have a Stealth ability which is cross-classable to ALL DoM and DoW classes and jobs. This stealth ability would not cripple movement speed as the DoL stealth abilities do, but it would only be active for a short period of time, say thirty seconds, before it needs to be reapplied.

With something like this, SE could finally start introducing genuinely dangerous overworld zones into the game, places where if a mob aggros you there's a very high risk that you'll be killed. Such an area would normally be frustrating if you had to deal with it solo - but if you could hide from the enemies, it would be another story.