Have you ever played Gothic 1 and 2? They used a similar system of locking off areas with very difficult enemies, which felt natural and organic and man was it engaging,
A unarmed guy taking out a shadowbeast at lv 0
There are a huge difference between Gothic and TB/RtWP CRPG. Gothic depends a lot on player input(mainly melee) while this RPG's depends much more on character stats. It is also possible to get really powerful weapons like Lars Axe on G1 relative early on.
The difference is that on a D&D game, if you got lucky, you can in a single dominate spell, turn a enemy into a allied and CHANGE the result of the battle. On DOS2, this is impossible due the mechanics like armor, cooldowns, etc.