I think Skellige is becoming too problematic when it comes to thinning. They can almost guarantee that they will draw all the cards they need to win. This is why some people think Lippy is OP, but I think the source of this problem actually comes from the fact that they are able to thin out their deck twice. The developers have noticed this problem because they did nerf some Discard cards. I think it's unfair that Skellige has a lot of good thinning cards while the rest of the factions struggle with that.