I wasn't going to comment on this argument at all, because I'm a total beginner at any kind of pente, and not even good at it!!!
BUT... cloak and dagger??? Am I the only one who reads these boards? Its been explained in L.O.N.G and very detailed posts why the restriction is necessary. Even I can see this!! And I can see why its better too. As a beginner I'm glad to play the correct way, and I'm glad I never played at IYT, its difficult to forget everything you've learned about a a game and play by new (and correct) rules.
Condensed, I believe thats what the main argument is, the restriction is part of the official rules, therefore should be in place.
Sounds good to me, I like to play by the rules :o)