I have to give Winds of Magic a good grade. It hits all the major points well and pulls the game together neatly. The background material is juicy and the spells presented seem to be the right ones for the job. Corruption, mutation, etc. has all the basic starts without going nuts too.
I'm seeing lots of potential for new animal forms for jade wizards.
Couple things I'd do differently:
1. Map of Altdorf sure would be nice..could you do a web-enhancement OFFICIAL map so that we don't have to use questionable copies off the internet?
2. Pictures of all of the monsters in the bestiary. It really bugs me that you guys list multiple monsters for each page of the bestiary, but then don't have pictures of each. This goes for ALL of your products. A picture is worth a thousand words..I mean it...that means more content elsewhere 
3. Once again, there is a serious lack of examples to go with the rules.
Thanks,
Jay H