The team went 1-2 without Letang, including back-to-back horrid losses to NJ. They will miss him more than Malkin. Despres has a similar skill set but lacks experience. 7 has improved his game over last year to the point of it being day vs night (since I got on him so much using his number, I'm using it here to praise him when he does well); he's the most improved Pen by far, but doesn't have the full skill set of 58. No one else is even close. The real problem is, what if it's a recurrence of a previous groin injury and continues to dog him all through the playoffs? His effectiveness could be greatly reduced, and that could be the Achilles heel for this team: counting on 58 for more than he can deliver.
Also, please, not Engelland while Letang is out, at least not every game. Play Despres every game and let's see what Bortuzzo or Morrow can do. And finally, surely there's someone at WB/S who can deliver more than Tanner Glass while taking fewer dumb penalties.