Without getting those high end prospects, it makes no sense. To move out for example Horvat and get a 1st (in the middle of the round), some cap dump with too much term and a B tier undersized wing/defensive prospect who might become a bottom of the roster is just terrible for the Islanders. Unless a team is offering up prospects on the same tier as Calum Ritchie, I have no interest in moving Horvat.
The main thing the Islanders need to do is figure out what to do with Pelech, Pulock, Mayfield, Engvall and Duclair first. Ultimately most need to be moved out in some form without anything comparable in terms of contract length coming back.