I've made the same proposition several times, but never got anybody interested in the possibility.
I think the six really were dissenters of allowing the possibility of denying Communion, because I'm pretty sure Bruskewitz, among some of the others you mentioned, said he would not deny it.
So the six, so called 'hero' Bishops, may have gone along with the wording of the majority of the Bishops, who decided it was an individual decision.
Those voting against it were p.o.'d that they couldn't get a statement passed that said, "communion will not be denied to anyone wishing to receive,if in her/his heart,s/he is following his conscience".
I believe this was a big victory for Catholics.