well there are some issues, but its probably a good idea, eventually, one thing that would have to change though is the difference in exp for low levels and high levels. a level 10 can easily get 700 exp in a fight, a level 50 would have to fight a god to get that much exp.

i think i got 2k exp for one kill at level 1.

and you would have to make it so you cant link to a DoH or DoL since they get no exp.
link with a level 10 GS and kill level 20 mobs forvever for hax exps.

but yeah it would take some work, i wouldnt want to see them do this before major content, but if they can do it alongside with no loss, its a good idea, and probably needs to exist in some form by ps3 release time, or if the game gets more popular, because there isnt so many jobs that any one playing from start wont have trouble playing with any new people/friends that left. Even if they have 1 or 2 jobs left that arent 20+ they probably hate those jobs sooo