Currently you grant 200% rxp scaling for level 30 quests which results in people zerging to 30 for that higher rxp with first-time bonuses.
If you had 150% rxp scaling for level 20 to 29 epic quest I think you would see many more lfms and interest in lower level epics. This would help promote the new smoother epic scaling curve and break people out of the rut of running wilderness to 30.