Rogue is literally thief in everything but name only. Also it class changing to Ninja is a homage to the original FF. I dont know what more you could ask for in regards to the class/job itself. They gave it Mug, which has always been the fully upgraded version of "Sneak/Steal" in former games. It already has a movement speed buff, so no holding down B button to sprint in the overworld map. The only other ability thief has ever had throughout the series was being able to see secret passageways-which, i dont know if thats what you're asking for or not, but i really got nothing there, esp in a 3d game where you can change the camera angle at will...Or i guess you want more of a tactics version where you can steal the enemies heart, weapon,armor, bank account, and marital status?