Bringing in Boyle will only help the team down the stretch. The rookies will look to him for leadership. He should be able to help the kids relax and keep level-headed. His leadership will help the young guns nerves. I know mistakes will happen, but Boyle will try to keep those to a minimum.
Eric Fehr was merely doing the Pens a favour of freeing up some cap space. But Eric can do some good here. He is a solid fourth-liner who can be useful down the stretch. He is a solid penalty killer and is a good spark plug who can help the Leafs' spirits. He will help the team with his hustle and example. He will do whatever it takes for his team, which will only motivate the rookies to higher heights.
As the Leafs continue to stay in the playoff hunt, this will only help the young players' development. The big three: Mitchell Marner, Auston Matthews, and last but not least, William Nylander, will become better players for being in the playoff hunt. They will learn how to deal with high pressure situations and will learn to do what it takes to win.
Regardless of whether the Leafs make the playoffs, they will be a better team in the future.