Yeah, I agree that all Bible groups should look at the bigger picture and stop all the fighting. However, I don't think you will find them coming to a concensus on doctrines. Born agains will never accept the WT view of Jesus or the Mormon views of God and witnesses will not accept the idea of a Trinity of Hellfire.
For example, I see ex witnesses come on this board and say, "The Watchtower got one thing right, God is not a Trinity!" They are just simply still under the influence of the WT even if they denounce them otherwise. An objective conclusion of that teaching, in my personal opinion, is that Bible verses can be plucked and interpreted to support both views and adhering to one over the other is just plain dogma.