There's a ton that goes into balancing a miniatures game. Each figure not only has to work by itself, but in concert with every other mini in the faction, and against all the other minis in all the other factions. That can take a lot of fine-tuning, which will continue on as the game goes along. And that's why we have the Dynamic Updates for Warmachine and Hordes. The latest have been posted. Go make sure you're using the most up-to-date rules.
From the update:
The following rules changes are effective immediately. The majority of these changes are reflective of the Legion CID that occurred mid-2020, with a few extra bits of rules cleanup on non-Legion items added as well. For each change, we will first cover what changed and then provide a brief reason why each item was updated. If an update includes a completely new rule or new text for an existing rule, that text is provided.