The duplicator should be kept an RTB mod and not default, sense you need the RTB prefs to even have the Duplicator working, for limits and such.
I could be wrong, once I got full version I got RTB so I never noticed no pref when you didn't RTB.
But either way, it should stay an add on, let the new people learn to build piece by piece so they can get used to things, then spam everything.