Late to the party after watching on dvd but Marchand has become such an incredible player in the last 3 years. The pest aspect was always there, he has been on the top forward PK pairing for years with Bergy, and has become so good on offense. The sneakiness to bounce it off Howard, the patience to wait him out in OT. Just such a great player.
Edit to add: Last year Marchand was tied for 5th in points in league, 12th in the Selke voting, and 7th in MVP voting. When he's in the lineup he's been as good or better this year.