Yes – I agree about the chiasms often being more about style, although having the central “thesis” identified can be quite revealing (if there is one).

Paul does use the matrix quite a bit as far as I can tell. Here’s a few if you are interested, and I believe there are many more:

http://www.bullartistry.com.au/wp/2009/08/31/that-which-is-perfect/
http://www.bullartistry.com.au/wp/2010/08/09/a-tabernacle-in-rome/
http://www.bullartistry.com.au/wp/2010/03/23/matrix-goes-to-brazil/
http://www.bullartistry.com.au/wp/2009/07/18/high-priests-of-ephesus/
http://www.bullartistry.com.au/wp/2009/08/06/armour-of-god/
http://www.bullartistry.com.au/wp/2009/12/08/seven-thousand-who-have-not-bowed-to-baal-2/
and this wonder in Jude:
http://www.bullartistry.com.au/wp/2010/02/09/wandering-stars/

Thanks for your comments.