Can I say I'm impressed? I'd like to test it out in CBT
Also, if you are going to make the exp rather slow going, can you give level rewards for ever 5 or even 10 levels? Slow iRohan style grinding is tedious now, and it really makes you enjoy the process more if every 5 levels or so you get something good to encourage you.
The servers that have done this only really give scrolls, and party kill seals etc.. which is boring. SES+ASES, Pres stones, craft weapons, SDV/IPV/ADV etc, good pet feeds, costumes would at least give the player something to grind towards short term.
On the other hand if the exp is higher, and levelling is smooth and fairly consistent, there's no need :P