most of the problems are just silly little bugs. clear them up and in my view its ready. (some issues with animation and costume, the npc pathfinding in interior maps etc) how long those bugs take it fix though is anybody's guess.
although keep in mind they plan to keep adding and improving it as it goes along so there is no 'finished product' or clear line that says its ready with the foundry, so it all comes down to if the devs want to add and test any new features before its ready to go live.
but at this stage its possible to make some pretty great missions and im happy with its general performnace.
There are some people that will never think its ready because of their own personal overreaction to various minor issues and unrealistic expectaions. However, most rational people understand that no system in an MMO is ever bug free or will ever have every feature people want on its initial release. Personally, I think it could be ready to go live in a months time.