If you need centers than I would substitute Backstrom for Pavelski in a heart beat.
It all really depends what your needs are.
IF Landeskog is your 3rd LW or you have one of equal value than I would make the trade. The Huberdeau component of the trade is laughable, since he is on the outside of most rosters in most leagues, looking in.
I am just generally not a huge fan of Pavelski and see SJ as a team getting worse.