For quite awhile I've thought of viable ways for Square Enix to get us back into areas that seem dead anymore. Leveling grounds many of us were quite fond of, areas all over Vana'Diel we may have just loved to go to and adventured in.
As it stands, level sync only allows you to sync yourself to the lowest person in your group. Instead, why not simply give you an option to the level you want sync down to and also allow a solo player to level sync by themselves.
This would open up a lot options and variety in being able accumulate eminence sparks, merit points, etc.
I often find myself wishing I had a reason to go to areas like the Altepa Desert and the Jungles outside of Kazham, but as it stands there's no real reason for me to. At least this would allow people to bang and bash on monsters in a place of their choosing which would also probably encourage people to play more, knowing they had a lot more variety in leveling and farming spots.
Please consider this, Square Enix. It could be a breathe of fresh air in a very stagnant experience points system.