State of the World now.
Jace is a Planeswalker with the ability to travel from world to world, so his focus doesn't remain on Ravnica long. Thanks to involvemnet of other Planeswalkers he spends extended periods of time away from Ravnica. During his absences Ravnica must fend for itself, and that means the guilds return to old habits of fighting with each other over any small scrap of influence that could tilt the balance in their favor.
These conflicts erupt in a variety of forms. Sometimes guilds class violently in the streets. Boros forces quell Gruul riots, Azorius arresters raid Rakdos murder shows, or Selesnya forces come together to repel Golgari incursion. Most often sinister plots unfold in secrecy. The guildmasters are often the source of these plots, but occasionally subordinates attack other guilds to gain more influence in their own. In the absence of the Guildpact some believe it is only a matter of time before these schemes and skirmishes escalate into all out war on a scale that Ravnica hasn't known for ten millennia.