Regardless of the animation, you shouldn't set the opacity in the animation file, because you can set it later in RMXP, too... this way, you're forced to use a fading-out animation...
Then for the technical part, it appears to be a very clear and smooth, yet sharp animation... very nice. The grayish-blue color in there isn't exactly fitting, though...
Lastly, the purpose of the animation... I can't think of a single purpose to use this, but maybe I miss something...