The only way this perk is not useless would be to buff the damage of siege weapons a lot. Which I honestly think is a really good idea.
Currently we use siege weapons just to “hinder” and not deal damage (because it’s pretty low). But buffing siege weapons, in addition to changing the meta and making this new perk useful, would be an alternative to the trumpet spam we see in wars today.
Didn’t siege weapons use to do more damage at launch and then they reduced it? Its been a long time but I feel like they did more damage before. Perhaps my armor is just better.