Oh so you have a magical gift oof seeing what would've happened and what could happen? H's got 3pts in 12 games (20,5 pts on a 82games schedule this year BTW) this year, he's reached the mark ONCE. even last year, on a 82games schedule, he was on pace for 39pts (that's not 40+ in my book)
He's a 30-35pts avegarge / season in the NHL since 2015, not 40. He's a 2nd pairing d-man, and giving away guys like Guhle, Caufield, HArris, Brooks, Ylonen, Norlinder etc. would be silly for a 2nd pairing d-man. He isn't, and never will be, worth a 1st + A / B+ grade propects.