I post every phase as a new thread so I can organise my games better. Every now and then a phase will throw up a contentious set of orders which leads to 15 replies on a topic. If that happened with this new organisation system it would create a nightmare for the players and GM's alike to find the orders to a specific phase. To counter that a GM would have to post the first 5 posts in a topic. The spring which they start with, the spring retreat, the autumn, the autumn retreat and the winter. That is prone to error, makes life more difficult for the GM, and removes any sort of chronological order out of the posts. The players spring retreats will be posted after the winter.
Personally, I think it would be better to try sorting out the index page than making GM's follow a posting procedure.