I kind of doubt they are worried that early release of patch notes will disrupt the markets and in-game economy, when you consider that the markets will be in complete chaos for the next few months regardless. The only thing I can think of that would influence player behavior before early access is whether or not we can spam level 45 crafting levequests as soon as 3.0 hits. You might see mats for those jump if they confirm it will work. Anything else in expansion will likely require new mats we can't grab yet.