As to the arguments, I have to agree with Billy, and there is more. We really don't need a GA deal with most of the decisions that are submitted to it. Most can be dealt with at a lower level, and do we really have to change some article of faith every 4 years? I like the idea of a confession of faith not being static and needing a fresh expression in each new age, but this frequent?
And as far as I can see, the rest of the resolutions can be dealt with by either the General Board, a national board or the districts themselves.
So my suggestion is to have amendments to the AoF automatically referred to a committee, to be appointed by the BoGS. They report to the General Board, and if the GB adopts the change, it would require 75% majority among all the districts. Change should remain possible, but not be easy.
When it comes to element of meeting, the M conferences and regional conferences seem fulfil that role quite well.
So although I love meeting people at a GA (and I really do!), I do not think that it is good stewardship to spend so much money on it. Nor do I see a need when it comes to the process of decision making. It may have worked in the early days of the church, but it's gotten out of hand.