Dour Handed outside of a dedicated side quest deck (which I realise is going to be the new type of deck) seems useless and while there are always plenty of niche cards it would nice if it wasn't a completely dead card without having several side quests in the victory display. Even with 2 or even maybe 3 side quests in the victory display this is still only doing 2 to 3 direct damage for 1 cost. Like John said compare this to Goblin Cleaver which does 2/3 damage for 0 and just requires a weapon attachment which is like a million times easier than clearing a sidequest. Almost all other direct damage cards seem better than this one for some reason.
Sure, Goblin Cleaver is better and easier to trigger, but not all tactics use weapons. My Ent deck uses a few side quests already and has zero weapons in it since Treebeard has no need of them. This may be a nice situational card to snipe out a few dmg on something. It also isn't about being as powerful as existing cards, but giving us different options - or MORE options. Why not utilize both and just murder things outright without engagements?