If you did read what I post there, you would get that without this way, this project won't bring out new people.
Multi client destroying this MMO, power leveling too, unless it is changed in way soo people enjoy to play it, it is done for.
Things I post above is really easy to even code, quests exist and rewarding system.
He just needs to add "kill selected mobs" those quests already exist in papaya, you know it because you played the DBO before right?
Kill 200 mobs and when you confirm you get reward.
It just needs to increase or decrease amount of mobs needs to be killed and even those papaya roaming bosses could be listed as mobs to kill.
Only problem for this would be to increase guild points via quests a bit and major problem that should be considered to be added are guild skills, but everything else shouldn't be problem.
About Cashers: Buy lvl 30 should be removed, instead exp potions from quests should be added, 100% for free players and 200% for donators.
One more, if they like the project and game as many cashers listed there, they will be happy to support the game and to get limited cosmetic for them. They cashed soo that they can play longer, well 90% of them and you could simply enable to them auto complete the quests if they do not have time for those quests and rewards.