He's probably just verifying that both sides are not ready to make peace. He'll drop off his cards and go home. Hopefully both sides can stew for some time and when each is ready, they can call and ask for assistance in creating a single state for all. By then, Likud will have fully killed off any chance for two states. Then, maybe when Jews are in the minority, they can thank Bibi for the favor.
Ya'alon okays administrative detention of Jewish extremist suspected in church arson (Haaretz)
from the article: Report: Mitchell to arrive in Mideast this week with no plan, no agenda