Mark and Kirk;
Thank you both for your answer.
Let me first say I'm far from beginner regarding post processing. I don't use only one software because I've discovered that one software can't cover all I wan't to do. Some software does one thing better then other. So at this moment I'm using DxO Photolab, Lightroom, Capture One Pro and Photoshop.
I'm using DxO software from DxO Optics Pro version 9 Elite and I gradualy advanced to Dxo Optics Pro version 11 Elite and now I'm using latest version of DxO Photolab Elite. I'm also using Capture One Pro from version 8 and now I'm on version 11.
Kirk, I agree with you. Dxo is not as good at recovery as LR and Capture One. Not to mention highlights reconstruction. I have also explained in post #255 some of other thing I don't like in Dxo.
funny thing is; yestarday I was searching for the same site you've attached in you post. I couldn't find it. I wanted to attach it to my post as an example what Dxo can't do good.
Those first two examples (the cave and the lighthouse) are a perfect examples of weird, unnatural looking half HDR images I wouldn't want in my collection.
That sort of images are not the best examples to show Dxo potentials. Dxo can't recover/reconstruct such photos. That's why I also have LR or C1 Pro.
Somehow I thought I'm lacking knowledge or missing some techniques.
But if Dxo developers on their own site can't do a better job at pushing shadows and recovering/reconstructing highlights, I can draw a conclusion that DxO Optics or Photolab can only go so far at the moment.
I can stop looking for answers and just wait they'll sort things out in the future.