The problem with Level Sync (to me) was never XP, that could already be awesome, it was the nerfed skills. If you were capped on dagger at 67 and synced to 28 to help a friend but hit 70 yourself your dagger is going to be 3 full job levels off cap now. What I would like to see added is that if you need x skill if whatever you are currently fighting gives skill to whatever level you are currently playing, then you should skill just like the player you sync to. Seriously, I usually turn down syncs to prevent widening my skill gap, this would make taking a sync party less onerous.

Still, if you want me to bring my bard there's going to be a fair chance I turn you down anyway when I consider the 20 minute macro reset (10 minutes down, 10 minutes back to real level)...