On the other hand, I can only think of one really nail-biting moment, and that was when sirfox got sucker-punched by the owlbear. Other than that, you've mostly gone through the opposition like a hot knife through soft butter. In the case of the cultists in the most recent session, without them even so much as getting off a shot (although there is a plot-related reason for that particular instance).
So I'm curious, my players: how do you feel about it? Do you want tougher foes? Are you happy with how things have gone so far? Enquiring DMs want to know!