Shoudn't the engine do a penetration correction? Lets say the character collides with a wall, and because it's so fast it benetrates by 3 units. Instead of stopping where it is, isn't it common to move the character backwards by the penetration value?

The problem is that the OBB library makes no difference between mere touching and penetrating an obstacle. But we're now aware of the problem and will try to find a solution.