Project: Gorgon is a 3D fantasy MMORPG (massively-multiplayer online role-playing game) that features an immersive experience that allows the player to forge their own path through exploration and discovery. We won't be guiding you through a world on rails, and as a result there are many hidden secrets awaiting discovery. Project: Gorgon also features an ambitious skill based leveling system that bucks the current trend of pre-determined classes, thus allowing the player to combine skills in order to create a truly unique playing experience.
The Project: Gorgon development team is led by industry veteran Eric Heimburg. Eric has over a decade of experience working as a Senior and Lead Engineer, Developer, Designer and Producer on successful games such as Asheron’s Call 1 and 2, Star Trek Online and other successful Massively Multiplayer Online Games.
Yes, it's suspicious as the Winter Coats, etc typically require less Leatherworking than the Leather Shirts, etc of the same tier.
Perhaps there is a hold up on an art asset, or the introduction of a higher tier component (e.g. 'Great Wool' or 'Superior Tuft of Fur'), or perhaps the Winter-wear line is meant to stop at Amazing.
Sorry, all i have for you are various conjectures.
It will get added soon. It just keeps getting bumped down the to-do list, but I suspect we'll manage it soon -- not in the next update (which is in QA now) but probably the one after.