This was the first time in a long time that they had little proven depth down the middle. After Carter went down, it was Kopitar, and that was it. Kempe was forced to be a center, and he's not an NHL center yet, if he ever will be. Then there was a mixture of Shore, Amadio, Laich, Mitchell sometimes, eventually Thompson. Then in the playoffs, Carter wasn't up to speed at all, Kempe was in a 2nd half slump, and Kopitar was all they had going. Basically the only forward doing anything consistently.
While I agree that Stevens does seem to quickly leave guys on the bench, there was a context to it as well. He didn't play any forward more than 15 minutes at ES in the 2 full seasons he was with the Flyers. Kopitar ended up at 17 minutes this year. He took around 1200 more faceoffs than the next King. Kempe was 2nd on the team, and he was at 38.5%. It was almost 300 more last year when Carter was healthy. Even if you add Shore and Thompson, Kopitar still took 1000 more than those two combined.
Should Stevens have done something different? Could he?