For those sighting level sync as FAIL because of astral burn are being just plain absurd. Astral Burn only worked under set circumstances.
you need ~4-5 smn and 1 person to sync to. You HAD to use your 2hr ability.

Level sync didn't stop parties in any level range from forming. It in fact encouraged it. Sure you may have sync'd in pick ups at certain locations more often than others. But it never obstructed gain XP.

In XIV you are S.O.L. if you are below lv 40 since the majority of the remaining player base is sitting on multiple 50's.

Level Sync is needed. Not just for the lv 50's to be able to group with the lowbies. But for everyone inbetween to have better options in having fun and experiencing the game in the manner it was supposed to be played.