On the campaign map, the Lizardmen are probably the least interesting of the four: maintaining the sprawling Geomantic Web that powers their highly powerful province edicts forces you to play wide, even while your major objectives contradictingly encourage you to circle the wagons and defend the core of your empire.
Their mid- and high-tier units present interesting tactical considerations in each battle in the question of where and when to commit to the melee, since they’re prone to going into a rampage state and deciding they don’t need your stupid orders once they’re in the thick of it. The enigmatic Lizardmen (whom I’ve spent the most time with) have access to a combination of rampaging dinosaurs and highly potent magic to the field. Those factions are the headliners of this battle royale: four extremely distinct and fun to command armies that bring new ideas to the campaign and the real-time battles.