For the rebuilding Miami Dolphins, winning in 2019 is not as important as winning in 2021 and beyond. The Dolphins want to win and will not “tank” but that doesn’t mean they can’t start trading some of the players that will not be on the roster next season.
To put it simply, if a player is not in the team’s long-term plans, they shouldn’t be on the roster for the immediate future. Finding trade partners may not be that easy but there are always teams that will make a play with the hopes to get better. If Miami could get more 2020 or even 2021 draft picks in return for players that will likely be cut next year, then do it.