The comet discussion on this forum so far has been dominated by three individulals (4, including myself, but I'm not really important enough to be counted into the mix).
All I can say is that this exploration has produced benefits beyond previous understandings. Unless this experiment had occurred at all, we would not have had the opportunity to discuss this matter to begin with. Let us remember that, far all the importance given to theory, nothing trumps actual observation and interpretation. We can all stand here and trunp "Electric Universe" over "Plasma Universe" over end-all. But, in the reality we exist in today, none of these things cannot be validated without good-old-fashioned exploration.
Nothing shakes a "theory" more than looking the facts square in the face.