I am more into removing the ilevel entirely and make it level based only and skill based, if anything.

It for starters for any level content grants the full pool of players as long as have unlocked the instance and at a job that is at the required level or above.

It would be better in general, also would need less time to focus on adjusting damage up and down and resistances and more onto bosses as well giving the more development time adding massive amounts of content instead.