DM and so far I'm finding it easier than Dark in TW3. However. it's good that you can still die quickly if you mess around so you always feel like you have to be careful and pay attention. I also like the way that even a tough fight can become much simpler if you actually use the potions and signs, feels more rewarding. Glad they managed to keep that feeling, it makes the combat more involved and 'Witcher-y'.
I'm absolutely loving the dodge - much more than the roll. I only roll if overwhelmed and I need to slap on Quen. The beauty of the dodge is that it protects you and yet you stay in the thick of it and can attack more quickly. It also looks and feels a lot better too imho, both aesthetically and in terms of realism/pacing.