joe134cd - "...But they are also going to lose the level of control they can exude on the rank and file..."
100% agree.
Rhetoric and propaganda only go so far in maintaining internal cohesion and discipline...
...actual, tangible group-oriented activities such as regular in-person meetings and the door-to-door work - regardless of how tiresome or unpleasant they may be - serve as the most effective tools for sustaining that.
I even remember an elder who, for all intents and purposes, spelled that out for me when I was a kid.