Matheson's at best a 2nd pairing defenseman on a decent team -- he's only on the top pair now with the Habs because their defense is so young. If he's still with the team in two years and is still on the top pair, then something went very wrong. He's also the best piece in your trade proposal. That doesn't even come close to getting EP.
And you keep mentioning EP being on an expiring contract. Any deal that is made for him is going to come with a contract extension -- it almost always does in these deals.
Would you trade away Suzuki for a 2nd pair defenseman, a B prospect, a 3rd line forward, and a 2nd round pick?