Eh, I disagree. I think Grievous has been Flanderized in a way. Simply because a person has cowardly traits doesn't mean that they are completely a coward. In fact, it takes quite a bit of courage on the part of Grievous or Cad Bane to throw themselves against fully trained Jedi Knights. Simply because they retreat when the odds turn against them doesn't make them a coward, it makes them smart. Heck, our beloved heroes in both the PT and OT do the exact same thing. Food for thought.