Originally Posted by Gorath 
Radon Labs indeed cut out 75% of the DSA system. But the rest is still quite a lot. Some of the skills are certainly underused. That's no surprise for a dev's first RPG.
In some details, they even changed the rule system. The way wounds are "produced" doesn't seem to be taken from the P&P rule system … At least not the way I heard about it, but I must admit that I'm not that deep into the whole system.
But the greatest change - imho - is the recuperation. The way of Drakensang how to get life points and magic points back isn't in the system at all, it's Radon Labs' invention.
There are a few more changes I heard about, but I'm not that deep into the rules so I can't really tell for sure.