Philly isn't doing this for 2 reasons.
1. Trouba's contract is worse than Hayes's.
2. Philly doesn't need a RD.

Its possible, maybe not this season as Philly has Ellis, Risto, Braun at RD.

But next season, its possible as Risto and Braun are UFAs, but I think NYR adds, Hayes has a much better contract and NYR are more desperate to move their player. If Frost or Foerster develop enough, Philly could move their 2C.

Maybe not tons, but it would require something substantial but doable.

I dont know but maybe 2022 STL 2nd and 1mil retained or 2022 STL 2nd and Kravtsov....not sure.

I think a straight up trade would probably require a 3rd party to take 2mil or more off Trouba to make it work, (maybe BUF takes that 2022 NYR 2nd and 2mil in retention), but theres part of me that thinks PHI just re-signs RD Rasmus Risto for that money instead and Philly just moves JVR for cap space.

NTC. That's why