I think we're looking at the Skinner-Eichel situation the wrong way. I don't think it was anything about Krueger wanting to keep Skinner away from Eichel. It was more about wanting to play Olofsson with Eichel, to put a rookie in a position where he could have success. I know that is unheard of in Sabres country but in the rest of the world, it happens.
The logical reasoning is that Skinner is a very established player so by plugging Olofsson with Eichel you release Skinner and make it possible to create a second scoring line. In theory, at least. But then Mittlestadt didn't pan out as we hoped so Skinner is playing with leftovers.
With one year under the belt of Olofsson and him showing at the end that he could perform away from Eichel, it will be interesting to see what happens going forward. Just make sure we have a decent center for the one not playing with Eichel and they'll be fine. I'm not worried about Skinner. Not yet.