A Herzog government wouldn’t have foreign policies much different from a Netanyahu government. It will propose Land for Peace to the Arabs, just as Netanyahu did. It will aggressively work to prevent Iran from getting nuclear weapons, just as Netanyahu has. It will aggressively fight the UN sham investigations of Israel, just as Netanyahu has. It will fight Hamas but won’t go out of its way to put it out of business, which is exactly what Netanyahu did.
The major difference is that Herzog wont diss diaspora Jews, and will do a better job at keeping up good relations with Israel’s supporters across the US political spectrum.