I use the orcs as small bands or minor clans. Like the movie "The Warriors" were most characters are street thugs, but still have personalities once you get to know them. If you step into another orcs turf, you better deal, beg or fight your way through.
The reason that Ravenland is not a new Mordor, is just because they lack a true leader. If someone could unite all the clans, the other races would probably be wiped out.
The computergame Shadow of Mordor is also a great inspiration of orc politics.
But the goal of the orcs is not world domination. They want revenge and the right to their own lands, their own lives. It is almost a matter of proving themselves to their former masters, a "we are your equals, not your slaves" type of thing.
I liked Shadow of Mordor, but I don't think it's a suitable likeness for the orcs in the Forbidden Lands. The orcs in Tolkien's world are tortured elves, corrupted by rage, pain and darkness while the orcs in FbL are a former slave race, presumably cast in that role by the Raven god, who were then abandoned by their masters and chose to make their own path in Ravenland. Two very different backstories.