I have read the APG quite a bit over the past couple of days. A couple of things stick out that seem out of sorts.
1. I know you touched on this already, but Gusting Wind seems way overpowered for a Level 1 Encounter Power. The area of effect and power effects are uber when compared to wizard spells like Color Spray, Burning Hands and Thunderwave. Being an encounter power, I expect it to be better than Thunderwave. But it is a bit much. My play experience (KotS, TsL) tells me that push effects are strong.
2. A vast majority of the Troubadour melee attacks target something other than AC. Other Leaders, Strikers and Defenders target AC a majority of the time with their melee attacks unless the power is meant to be "armor defeating". This seems to give the Troubadour a decided edge in melee.
Other than that, I like the product well enough. I think the races are well done. The rules in the back, such as crafting and optional wound effects, are also well done. I think some of the class powers may need to be tweaked to make them comparable to the other classes we've seen so far from WotC. But maybe I am wrong...