I have played plenty of mmo's and have been an avid market player. The whole thing about people using patch notes to manipulate the future market is sketchy at best because often the notes change pre installation of said patches. I don't find any validity in your statement but I do notice a hint of scaremongering to be completely honest. Plenty players on my server are for the implementation of a patch note post that changes based on important decisions made by developers. I personally don't see any major economical threat by showing these notes atleast 1 month in advance.