Hey Danny,
"However, my reading of the Great Commission is that the priority is on 'go and make disciples' - thus a missional thrust, a missional driver. Baptising and teaching are secondary, not in the sense that they're not important but simply the reality that you can't baptise and teach someone to obey with any transforming effect if they haven't already become a believer. Therefore 'go and make disciples' is the driver, once we have a disciple(s) we can administer sacraments and teach Christlikeness and form church."
I think you need to reconsider the grammatical structure of Mt 28:28. 'Make Disciples' is the imperative on which which two participial clauses hang: 'baptizing' and 'teaching'. Those participial clauses could be instrumental - make disciples by baptizing and teaching; or epexegetical - make disciples meaning baptizing and teaching; but they cannot represent consecutive actions - make disciples then baptize and teach them to obey everything Jesus commanded.
In other words, there is no content to 'making disciples' in Mt 28:28 other than baptizing them in the name of the trinity and teaching them to obey everything Jesus commanded. We can't really make disciples first and then do the rest as a secondary imperative.
Anyway, the problem I'm driving at, brother, is that if we perpetually take it upon ourselves to splinter out of established ecclesiastical structures because of missional pragmatism, in that very mission-motivated act we contradict the mission of Christ. We set ourselves up as lithe little unfettered missional missiles precisely by failing to be the church Christ sought to establish!
As PA pointed out the other night, Paul was speaking to a very mixed up Corinthian church when he said "if anyone destroys God's temple, God will destroy that person. For God's temple is holy, and you are that temple." (1 Cor 3:17) And again in 2 Corinthians, rather than urging the orthodox to leave the super-apostles to die and organise breakaway groups, he says "Put things in order, listen to my appeal, agree with one another, live in peace; and the God of love and peace will be with you." (2 Co 13:11) Our conduct within a missional church, no matter how pumping we are with prophetic words, is to be informed by the nature of God, "For God is a God not of disorder but of peace." (1 Cor 14:33)
Part of the problem, as I see it, is that we often start with the assumption of reality - the splintered denominational Christianity around us and then move straight from there to expressing mission in that context. But I think we are called firstly to see how far our present splintered reality falls short of Jesus' strongest desire for his church - that they may be one, as he and the Father are one - and then work out what it means to express mission as a whole church in this ideal construct; and only then consider how that might play out in the limitations of our present circumstances. The fractured fabric of the church today is not God's seal of approval on any new fractures we might wish to open up for missional expediency, it is a tragic outcome of Satan's work among the flock of God. For the new generation of shepherds in God's church to recommend we leave the frail flock already entrusted to us "to die" while we seek more exciting flocks elsewhere seems to me to correspond neatly with Satan's agenda. If we cannot be faithful with a little, will God entrust more to us?
Blessings
Matt