For one, Twarynski & Bunnaman already have a full AHL season under their belts.
For two, they are older, stronger & more physically mature.
For three, Twar & Bunnaman are filling bottom of the lineup, limited minute roles, which is their future. They don’t want the kids who project as top 6 guys getting limited minutes & being role players when they could be getting big minutes & developing their offensive games in the AHL.
For four, Vigneault said it on the last Behind the Glass: he wants prospects like Farabee to gain some confidence in their offense not lose confidence.
For five, you don’t want to be yanking the top prospects in & out of the lineup, & shuffling them up & down leagues. It’s unsettling. Let the youngsters have a degree of comfort & consistency so they can focus on their play.
For six, Rubtsov wasn’t very good toward the end of his preseason tenure, got destroyed on faceoffs, & only has 20 AHL games to his credit. There are still things he needs to work on, which is what the AHL is for. It’s not worth sacrificing his development because he could have a good future.