Struble, Harris, Guhle and Xhekaj are sticking in the NHL. Ylonen is only there because they don't want to waive him. That's overly patient and not really helping the team or Ylonen.
I see Barron will be eligible straight from the beginning as the amount of games he played this season counts as a full season. If they do the same as they're doing for Ylonen, then my opinion is: Overly partient. If they waive him straight from the start and no teams claim him, waiting for him to do anything in the AHL is overly patient as well. That happens because teams' rosters are usually full at the beginning of the season.
Once a player can hit the waiver-wire, and can't secure a spot in the NHL, you need to think about building with alternatives. You can be more patient if you have a stable lineup, like the Red Wings some time ago. In a rebuild though, you're looking for solutions, and the more prospects you look at, the better.