Not the biggest fan of the Penguins paying in these trades.

Sabres pass - the draft picks don't offset paying an aging oft-injured defensemen $2M more than what they'd save in dealing Olofsson.

Unlike other Sabre fans, Petry does have value.
As a mentor for Power but a huge upgrade over Bryson.
He can eat minutes, PK, hit and run the PP if needed.
The seconds would be extra darts to throw at the draft board or chips to pick up players at the TDL.
If Olofsson could not return at least this much, they may as well keep him to play on the fourth line.