Before their later updates, they lacked the durability to survive the high-damage output of the 3.0 meta.
The ultimate beneficiaries of the 3.0 rules. An army of Mega-Gargants was incredibly difficult to shift off objectives, forcing a "DPS check" on every opponent. Tier 2: The High Performers age-of-sigmar-power-rankings-2021
Universally regarded as the top contender in 2021. Between the "Thunder Lizard" sub-faction and the sheer utility of Lord Kroak, they had an answer for every matchup. Before their later updates, they lacked the durability