Assuming they have more people live then in this pre wipe beta, they're seriously going to need to double the world size. Assuming the game and servers perform flawlessly, the first few weeks is still going to be a complete mess with all mobs and nodes just being completely raped at all hours.
They also need to figure out something different then LP, which is points you spend to level up "early" and get more of each month. You start with I think three months worth which will get one of your skills to tier 8? Maybe a couple skills I'm not sure. Once you're out of LP you're in for the long hall grind (about 4x the fame?) to level. It promotes multi accounts in big guilds that can gather the resources to funnel to different individuals that specialize in different crafting and gathering things.
If they address the above smartly, and deliver some nice qol and balance stuff then we might have a pretty fun game on our hands.