Seeing that pic...

Reaper + MAR or LNC = DRK
Reaper + THM = Warlock

Yay Magus >.>

And yeah an issue with the new job/class system is main hand determines class. However they could give drk a scythe without changing any BTN main hands as a War Scythe is actually quite different than a harvest scythe. Also there's other class/jobs people want that would use a greatsword. And Katana should really be saved for possible Samurai in the future. Also a sizeable amount of players that want drk in ffxiv do so from playing the job in ffxi where drk had A+ scythe skill rating vs Greatsword's A- rating. Scythe also made darkness chains while Greatsword made light and... um.. we want darkness and evil looking stuff :P