Looks fine to me! But then I can only see the first picture...
In After Effects, when you import an AI or EPS file from Illustrator you need to click the 'continuously rasterize' icon for that imported file's layer in the timeline. It is a little sun icon. This means you can then infinitely scale the Illustrator file up or down in AE without losing any detail/definition. Hope this helps.
Oh - I noticed you've got quite a thin keyline around your character. On TV if this is very thin (1-2 pixels) it will look pretty nasty and will fizz or twinkle. To fix this either make sure your lines are thick enough or you can sometimes put a very light motion blur on the offending parts and that will remedy it.
When you rasterize the edges, you are removing the anti aliasing which makes the edge look smooth. Since Photoshop uses pixels to render the drawing, if you remove the anti-aliasing, you loose the element that made it look smooth. If you wish to retain the vector quality of the drawing, illustrator which is a vector based program would be a better choice to create and output the illustration.