Finally gave this one a try.
I was surprised at how different it felt from Darkest Dungeon. The four against four battles, the menu of battle options, the town screen, and the trail through the dungeons all retain more or less the same look. But I find myself thinking differently as I play, so it is quite a different experience.
The biggest thing is grinding. Darkest Dungeon is the poster child for grinding as a central game mechanic. In its final form, it enforces hours of grinding. Iratus forbids grinding, you actually want more opportunities to gain experience and are denied them. If you lose units, you use brains of the level you previously reached to create new units; if you lose more units and no longer have a supply of brains, you are almost certain to lose that game. (an impossibility in Darkest Dungeon, where setbacks are inevitable, but you are not defeated, you just go back and grind for a few more hours)
But I also like the fact that Iratus provides interesting options how to bulk up for the increasingly difficult foes. You have Iratus’s talents, but if you want to cash in big on those, then you better be using Brides and Death Knights to supply him with points, and that is at significant opportunity costs. You can focus on minions’ direct damage, which is the most concrete and predictable, but has its limits in terms of enemies. And you can use stress, which is wonderful when it works, but relies on RNG more than the other choices – one enemy can crack and betray his side when the stress bar is still half full, while another keeps right on clobbering your glass cannon two big stress shots below zero.
The opportunity costs are acute, and the effort to strike an effective balance is interesting, and the mechanics for achieving that balance even more so. The level-up involve choices with two distinct parts to them, and the use of alchemy on minion replacement parts is a great mini-game all its own, with huge impact on the direction your minions take.
None of this reminds me of Darkest Dungeon in the least.
Of course, I have no idea if this game has legs. And there are some weirdnesses (lack of clarity as to opponents’ abilities, blocks from opponents who appear to have zero blocks, etc.) that may be bugs and may be features. We’ll see when it is finished. But for now, it makes a great first impression.