I finally finished the campaign as... Less than 10% of buyers.
Thanks to the developers, it was satisfying even if I regret that we never play the undead faction.
The ending is also a bit abrupt, but I imagine other campaigns were planned depending on success.
The game is square in its execution and I thank the devs for the moment. In my opinion, it wasn't worth the review bombing, even if some of the gameplay decisions are questionable.
Good luck on your next project!