The whole "Capitalism out of control" thing wasn't such a good idea to begin with. Instead of some moral play "Out of control" thing they should've just had them be the Corporate side of Trek, no "out of control" stuff but just an example of Space Corporations. Good, bad and neutral.
I mean heck, even keeping the Ferengi as short guys with big heads could still work out: They're the CEOs who hire impulsive mercenaries or Mob Bosses with big tough goons. The usual "Short guy with big tough bodyguards" thing.