You know instead of "adding" new jobs the traditional way why not make it so that we build from the jobs we already have? For example Warrior can switch from its original tank form and switch to Berserker/Fighter for DPS or Machinist can switch from Machinist a mid range DPSer to "Gunner" for long range which does more damage but has cast timers or something. It would save space in terms of weapons/armors and job stones taking up slots? It would also cover people that love certain jobs looks but don't like being a tank/healer or DPS.
Just my two cents.
