I have had serious issues with the quests that are time sensitive.

Meat vendor in calpheon who sells the special ham does not spawn at all, i say for 24 hour game time at his spawn melting ore and no luck.

Same thing with the old lady in calpheon. 

If you put a clue on the quest like the old lady is scared of the dark, then spawn her at 8 am and despawn at 5 PM, that would be fine.

Instead you have a blue path to an empty spot with no idea if it is just some one who walks around or is missing.

Also the moon pearl quest seems to have a random loot window, I have looted some days at one time and cant the next.

The shrubbery in that area for another quest dont despawn in a timely manner. I assume that time is borked as well