Continuity errors are hopefully gonna get updated soonish, though I understand they wouldn't be at the top of a dev's priority list.
I agree on things being quite expensive - the NPC in the weapons shop comments on this, talking about crafting. (Though the Dragon Blade isn't all that necessary, imo.) Personally, I hope the expensive prices are in place to give a certain feel to the story, like "Being a new adventurer is rough," although the rest of the game's tone seems to disagree with that sentiment. Time will tell?