That drama doesn't mean Federation should split, it just shows the people in charge were in disagreement with people on streets and underestimated them, thats all. If the long march had gone violent and govt had failed in controlling then that'd be an issue.
Federation has already split as it no longer exerts any control over large parts of the country. Now with an even degraded power center, there is absolutely no reason to believe the federation is capable of doing anything for the provinces.