Pretty much! Timbers, peasants, no electricity. I wouldn't call anything from the dreams useless, per se - it was probably given to you for a reason. Deep mushrooms generally make potions last longer, which is why they go into the regeneration potions for example. My friend I was concocting things with had a bunch of her own herbs that were similar to the ones in Thedas, so we made it work.
Mis-paps, well, hey. I've got you covered. I actually don't know any Force mages here, but I'm sure there are some around. I'd have to ask.