I think at least a new new region-wide chat channel would be a very good idea. Then you could sit in any of the Jeuno zones and still see all the pick up group shouts you might be interested in. Combined with abyssea warpers in more of the jeuno zones, I think this would greatly lower the congestion issues we have now.

It would also make sense elsewhere in the world. If you want to team up with someone out in the field, it would often be easy for other interested players to get to where you are if they already are in the same region. Maybe they are in the same region for the same reason as you too, but just haven't zoned to the same area that you are in yet.