You won't get better from a steadymove filter. In truth I've not played with it but I do understand how it (they?) work.
They are trying to remove camera shake right? So, what is at the edge of one frame may be just off the edge in another frame and similar on the other side of the screen. What they do is take a smaller area of your picture where it can be assumed will always be in frame (so to speak). This smaller 'window' is moved around your frame compensating for any camera shake. As a result of this, the 'good' portion has a border around the edge and finally the whole thing is zoomed digitally to fit your frame again.
So basically, you will always get a slightly cropped and zoomed result from using the filter.
Hope that all makes sense
Not sure if it exists in Premiere but Photoshop has a rally juicy 'unsharp' filter which will then help tidy up the edges, sharpening them again. btw, that's not a typo. The
UNsharp filter sharpens the image. really!
There must be some sort of sharpening filter though, surely, even if I haven't bothered looking for one yet.