It’s a good low-risk move. If they’re betting on EZE and Malachi to be their edge rushers for the future, then Miller serves has a short-term bridge and mentor. He’s also not really an every-down player anymore, so it won’t take away any snaps.
Trading for Crosby would be more high-risk. Not only would it cost future draft picks to acquire him, but it would take away snaps from the young guys and it would be unlikely we’d retain the young guys for a second contract.
That doesn’t mean that trading for Crosby would be a bad move. We did the same when we acquired Q Williams. The difference with Q was we really had no young DTs we were developing.