I think it's more likely Foudy doesn't return but still see a small possibility he does. Better to assume he won't be back and accept a valuable surprise if he does.
DeAngelis is about the only one I can see bringing back a solid upgrade on D.
2 things,
You are correct Foudy probably not returning, although frankly if he did he would the player I would deal for a dman.
In fact I would trade him and Robinson for a dman.
One can tell they were preparing for life without Foudy by the configurations of the forward lines at camp both in scrimmages an the blue and white game.
I will explain,during the scrimmages with 3 squads each one had a line consisting of top lines,Zito was with D'amico and Peer,Johnston on a line with McDonald and Miedema, and Abraham lined up with Cuylle and Maggio.
Foudy was not put with any of those lines.
All 3 lines were excellent throughout the scrimmages and then when the cuts were made to play the blue and white game all 3 lines were kept,with 2 going on 1 team,1 on the other,and Foudy was placed on the team with just the 1 line.
Very telling to me quite frankly, one could see if u were was preparing for life without Foudy.
Ironically Team White which only got 1 line won the game 11-10,yes Foudy got 1 Goal,nothing else but rookie Ethan Martin, had 3 goals and Alex Campbell and Josh Beiles had 1G,2A
each for Team White.
As for trading DeAngelis that's not happening Spits are building now and in future around him,Bronson Ride,Jacob Crisp, Francesco Dell'ulce and Tanner Winegard.
If anybody goes from the D I would move Robinson and Jodoin before anyone else,and Jodoin looked good at camp and is only 18 years old.