Here's mine:
-pick up loots quickly not by pressing function key repetitively, either a pet/collector skill or smooth function keys just like roaming around the map using only arrow keys
-put up a marketplace NPC
-have daily quests at PVP, dungeons and low level maps to help as well new players
-events for low level players
-PVP map that does not need strong equips and maxed buffs
-quests from level 1 to max
-balance experience and drop rates
-put up weekly tournaments
-no dual clients for fair play just like the original