Things they should take: Map size, fully seamless world (aka lack of load screens/invisible walls), FFA Full loot PvP (I know, I know, we'd lose the majority of players, but I still want it

), real-time combat, needing to aim spells/arrows/melee swings (ie: no homing even with soft-lock), lack of AH, collision detection, friendly-fire, guild-owned NPC settlements, mount-stealing, no area level-scaling, minimalist HUD, world bosses that need massive groups to kill, fully immersive first-person view (I know they're working on it), player housing, real-time naval combat!!!
Things they should avoid: Terrible animations, terrible armor designs, terrible character designs, lack of customization, crappy architectural designs, the worst menu system I have ever used/seen, terrible sound design, total lack of in-game consequence for being a ganker, safe zones, their community of morons.