The light angle and harshness hurts you here. the brighter the light, the more important it is to work on the sun angle to avoid the harsh/dark shadows you see on the far wing. There appears to be no detail there.
I like the wing up position and the sharpness looks fine for me. I agree about the sun angle but it looks like it's flying over a fozen lake so you probably couldn't change you angle to take advantage of the light. They never cooperate do they? :D