CloneDVD won't "uncompress" anything. It can't undo the damage done , because making the video smaller is not lossless, so making it bigger will not bring you back the "lost data".
Some people complained "CloneDVD does not fill the disc to utilize 4.36 GB". Well it does this very precisely, unless the source you want to copy is smaller (quality bar at 100%), of course!
AnyDVD will work on non-CSS protected discs as well. Even on discs in Virtual CloneDrive. (e.g., to remove RCE, jump to main title), or on Mini DVDs on CDR.