Ok, let's gather round and grab some sticks and let's pass the time laying into these dead horses.
1. Cross-Class tweaks
I would love a little overhaul of the system. What would be ideal for me is if we could use our five slots not just for select active skills, but passives too. As a PLD I don't really use WHM skills in dungeons, but they sit on my bar just cause. I would gladly swap something like Protect for Enhanced Foresight or Bloodshower.
2. Dark Knight
Please..... Eorzea needs a healthy fear of the Dark.
3. Some new Job missions and Rewards
We had a system like this in FFXI. Maybe a series of missions that unlock 5 new traits. To be fair you could only use one trait at a time. You would be required to equip them to the Soul Crystal. Ok PLD pick, do you want more arrgo? More HP? You can only pick one at a time.