The comparable for forseberg are Pacioretty and Stone.
Pacioretty got
Suzuki (who at the time most thought was going to be a 2C, recently drafted 13th overall pick)
Tatar (middle six forward to make the cap work, Vegas was scratching him more often than not)
2nd
Stone got
Brannstrom (high end D prospect)
2nd
Lindberg (who is this, throw in)
Neither returned a current young player who is on track to become at the very least a 1B centre in his second season or a recent 3rd overall pick who in his third season is still in the top 10 youngest players in the league.
BTW both of Patches and Stone came with extensions. I feel like Patches and Foresberg are very similar players interms of what they bring and Stone is the most valuable of the 3 by far.
Caufield could he considered a fair ask based on precedent but not Suzuki, KK, or even Romanov as all 3 are on the roster