Well, how do you know it hasn't been? Gorton has been even more tight lipped about his moves than Sather, who would at least leak some stuff now and then. No use getting indignant about things we can't know the truth behind.
That said, I don't think there is or should be a rush to dump all the vets as fast as possible and someone like Kreider might even be a player they decide to keep around.
Remember that Gorton has talked about "accelerating the rebuild" several times and it has never been their intention to be bad for a long time and slowly get better. That's part of why they targeted players like Howden, Hajek, Rykov, DeAngelo, Fox, etc. They've been looking to bring in young players who are ready to start contributing sooner rather than later.
While it wouldn't surprise me to see Kreider traded, it also wouldn't surprise me to see him kept as kind of a bridging piece (along with Zibanejad, etc). My suspicion is that Gorton wants to see this team making a push for the playoffs by the 2020 season and not be a bubble team for long after that but right back to being a contender.