I applaud the attempts to shake things up, though my principle faction of interest is admittedly not yet involved.
I do, however, hope that Bretonia is given some kind of boost, in terms of a technological breakthrough, resource discovery, or new alliance to ensure it can hold its own, in RP, in future. Poor Bretonia's luck just keeps going from bad to worse.
Efforts inevitably had to be made to help integrate Gallia into gameplay, in a way that was left on the to-do list after 4.85, and perhaps the situation is not ideal, but it will make for interesting times.
My only critique would be that this seems to be a huge number of changes in one mod, and that so many drastic shifts in one go may be difficult to handle. It may have, perhaps, been better to let this happen more gradually.
I would say that I would hope Kusari, Gallian and Bretonian factions take this storyline on-board, and act it out, in terms of forum-RP and in-game RP events, in the run up to the mod release.
This would mean that, rather than an abrupt and sudden change, we can actually see the changes happening in-front of us as if the story were properly evolving.