Game definetely needs much more harder difficulty, though I prefer customisable difficulty settings like in Pathfinder: WotR.
From time to time, I see that some ppl asks for more mob density, like x2 or x3 more mobs. Do you guys realise what you asking for? One fight will be x2 times longer...no...no, thank you. I prefer another approach, it's, as I said, customisable difficulty settings or one more difficulty level, which will nerf some buffs, poisons, potions, like Potion of Speed grants 1 additional action per 2 turns & ofc higher enemy stats, no respec, disabled saving during combat\dialogue, rest req.more resources, smarter AI & no explosive barrels, at least 1, which should be extremely heavy and carried on the back of our character(obviously with stealth\combat penalty) which can be detonated by enemies.