Morrowind isn’t really meant to be finished as far as i can tell
the big bad is mostly there for that sense of tea-sipping, kitten-stroking dread
i do like how sleepers and other unmentionable things start showing up as you progress through the main quest to give some sense of progression even when you’re fucking around in nowheresville but that’s the most urgency the game ever tries for outside of, like, corprus