I think the only reason why NG doesn't get the nerf is that CDPR sees a huge base of its users play nothing but NG, and therefore, they don't want to be on the wrong foot with the crowd sentiment. That's why you see Drill getting a nerf (which is fine), but NG getting a 5-prov card that can steal just about any of your strongest cards from the graveyard without any capping or condition (which is never fine). So, after the initial excitement of this new expansion drop dies down in a week or two, you'll find even more players playing nothing but similar NG decks, which is a shame since there are hundreds of different decks from other factions, which would have been tried out by players otherwise.
What CDPR doesn't realise is that a large base of its players are leaving or are playing a lot less because of NG. No, I don't think they have anything against NG players, but most of them like to not only play but face a variety of decks in Gwent. And that is the very thing that's becoming rarer and rarer with every passing expansion because, no matter how many newer decks you try, you're doomed to face the same deck over and over again, which makes the game "meh" after a little while.
So, no matter how many expansions it drops, until CDPR finds a way to draw people away from NG and try out newer factions and decks, they'll be facing the same problem. I fully appreciate their effort to make some of the more obsolete meta-s more playable with the changes in this patch and drop, but that won't make enough people try out factions other than NG as long as it is getting even more overpowered. So, I'd say the real elephant in the room has not been addressed yet. As a real well-wisher of both CDPR and Gwent, I do hope they address this issue sometime in the near future.