Short answer is, no. There's a little content after the labyrinth, but not a whole lot. What you want to do is grind thru all the prior areas, repeatedly. Get them stats up. Earn those holy points and redeem them at the church with the Goddess (there's a rosary you can buy that basically ends low rolls). Why do this you ask? So when the next version comes out, your character is powerful enough to take on anything the capital city can throw at you.
For me (and I suspect many of us), Sofia, Venefica, Tiamat (from the dragons mod) and Dark Perpetua aren't even challenges any more. I still enjoy playing the game occasionally for fun, but my goal is to suplex the demon queen into being my bride.