I have no sympathy with Gafcon and schism at all – but I think that what is being proposed on the ground in Southwark is actually the way of the future. That is, I think the present system of parish share is impossible to make work well, and an essential precondition for the prospering of the Church of England is the abolition of parish share. (I’ve said a bit more here)
An alternative system could be very simple: parishes pay for their own ministers; they tithe to the centre; missionary appointments are then paid either from the tithe or from direct giving. Clear, simple, transparent, biblical – what’s not to like?