ok here goes:

1. change the market board to an auction house... knowing every listed price when you list an item is seriously hurting the economy too because it drives prices to the floor. I would also implement a tax for listing items initially.
2. get rid of gear drops from dungeons and leves... there is no need for a market if there is no demand for anything crafted or farmed.
3. bring back NM's and drops from them.. they were fun to farm and camp against other people especially hnms
4. give more incentive to do dungeons.. by the time people are end game from fate grinding they have 0 clue how to play the job/class to end game standards.
5. open world real xp for parties and open world exploration would be awesome. there is really like 1 reason to even look at anything you guys made... the hunting log..
6. make craftable gear just as powerful as myth gear etc.
7. make weapons/gear that take months or even years to build...