Animated gifs were never intended to be smooth-motion animations, they were intended to allow people to short, very limited animations that are usually a few frames a second. A real animation would be between 24 to 30 frames a second and most animated gifs are usually done in the range of about 5 frames a second or less. That’s what they were intended to be.
Animated gifs are not a format that you want to think of as a full frame size, full frame rate delivery mode. If the web is where you are going to deliver your animations, then Flash is what you want to consider. If video is your destination, then look at After Effects.
ImageReady is for making web banner ads mostly. That was its intended use.
Best regards,
Ron Lindeboom