Before start reading, note that this is only a suggestion based on my opinion; thus, you aren’t obligated to agree with it.
After following the game over a year, playing in the iCBT 's (the last 2 ones), reading several topics, an issue caught my attention; one that has been discussed several other topics: Leveling. No, this isn’t a “omg xp so low imc pls” topic, but a topic to discuss and propose a solution to some problems like level gaps between maps and map grinding impracticality.
The basic idea of the suggestion is: after complete all the quests of an certain map, the Exp. gain from monster hunting on that map is increased dramatically, almost reaching the Exp/Time of doing quests and using Exp. cards. So, for example, if you complete all quests in a area, and the next area is 8 levels above your level, you could just stay in the completed area and grinding until the level gap dissapear; or if you like grinding, you can just get into a party and stay on the completed area, receiving the same amount of Exp. comparing with doing the quests in the next area. This would eliminate 2 problems at once, making grinding satisfactory and a viable option for leveling, and also give a option for resolve the level gaps between areas/maps.
Tl;dr:
The basic idea of the suggestion is: after complete all the quests of an certain map, the Exp. gain from monster hunting on that map is increased dramatically, almost reaching the Exp/Time of doing quests and using Exp. cards.
Thanks for reading and feel free to make a healthy discussion. PS: ENGLISH IS NOT MY NATIVE LANGUAGE