From LeBrun's latest Rumblings blog:
The Sens have also kicked tires on Jakob Chychrun, who would come at a high cost if there’s even a trade fit with Arizona.
MacKenzie Weegar would have been a big score for the Sens, but I believe the Panthers have decided to keep him after losing Ben Chiarot to free agency.
Whatever the case is, if Sens GM Pierre Dorion can acquire that missing piece on the blue line, he will have had quite the offseason.